63616156640 has 96 divisors (see below), whose sum is σ = 151959991680. Its totient is φ = 25165085184.

The previous prime is 63616156627. The next prime is 63616156651. The reversal of 63616156640 is 4665161636.

It is a junction number, because it is equal to n+sod(n) for n = 63616156591 and 63616156600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11005271 + ... + 11011049.

It is an arithmetic number, because the mean of its divisors is an integer number (1582916580).

Almost surely, 2^63616156640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63616156640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75979995840).

63616156640 is an abundant number, since it is smaller than the sum of its proper divisors (88343835040).

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

63616156640 is a wasteful number, since it uses less digits than its factorization.

63616156640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6544 (or 6536 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 63616156640 in words is "sixty-three billion, six hundred sixteen million, one hundred fifty-six thousand, six hundred forty".