139340944656 has 75 divisors (see below), whose sum is σ = 403332017781. Its totient is φ = 46442502144.

The previous prime is 139340944637. The next prime is 139340944657. The reversal of 139340944656 is 656449043931.

It is a happy number.

The square root of 139340944656 is 373284.

It is a perfect power (a square), and thus also a powerful number.

139340944656 is a `hidden beast` number, since 1 + 3 + 93 + 4 + 0 + 94 + 465 + 6 = 666.

139340944656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7659050256 + 131681894400 = 87516^2 + 362880^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (139340944657) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 13433040 + ... + 13443408.

Almost surely, 2^139340944656 is an apocalyptic number.

139340944656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

139340944656 is the 373284-th square number.

It is an amenable number.

139340944656 is an abundant number, since it is smaller than the sum of its proper divisors (263991073125).

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

139340944656 is an frugal number, since it uses more digits than its factorization.

139340944656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20758 (or 10374 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 54.

The spelling of 139340944656 in words is "one hundred thirty-nine billion, three hundred forty million, nine hundred forty-four thousand, six hundred fifty-six".