139561842502656 has 704 divisors, whose sum is σ = 474535343488000. Its totient is φ = 39691610357760.

The previous prime is 139561842502651. The next prime is 139561842502721. The reversal of 139561842502656 is 656205248165931.

139561842502656 is a `hidden beast` number, since 1 + 3 + 9 + 5 + 61 + 8 + 4 + 2 + 502 + 65 + 6 = 666.

139561842502656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 139561842502593 and 139561842502602.

It is not an unprimeable number, because it can be changed into a prime (139561842502651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 42823515555 + ... + 42823518813.

Almost surely, 2^{139561842502656} is an apocalyptic number.

139561842502656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139561842502656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237267671744000).

139561842502656 is an abundant number, since it is smaller than the sum of its proper divisors (334973500985344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139561842502656 is a wasteful number, since it uses less digits than its factorization.

139561842502656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4245 (or 4221 counting only the distinct ones).

The product of its (nonzero) digits is 93312000, while the sum is 63.

The spelling of 139561842502656 in words is "one hundred thirty-nine trillion, five hundred sixty-one billion, eight hundred forty-two million, five hundred two thousand, six hundred fifty-six".