63655831613 has 48 divisors (see below), whose sum is σ = 77167749120. Its totient is φ = 52258932000.

The previous prime is 63655831553. The next prime is 63655831621. The reversal of 63655831613 is 31613855636.

It is not a de Polignac number, because 63655831613 - 2⁶ = 63655831549 is a prime.

It is a super-2 number, since 2×63655831613² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63655831693) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4768358 + ... + 4781688.

It is an arithmetic number, because the mean of its divisors is an integer number (1607661440).

Almost surely, 2^63655831613 is an apocalyptic number.

It is an amenable number.

63655831613 is a deficient number, since it is larger than the sum of its proper divisors (13511917507).

63655831613 is a wasteful number, since it uses less digits than its factorization.

63655831613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13470 (or 13459 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 47.

The spelling of 63655831613 in words is "sixty-three billion, six hundred fifty-five million, eight hundred thirty-one thousand, six hundred thirteen".