63556865536 has 40 divisors (see below), whose sum is σ = 127448327160. Its totient is φ = 31663638528.

The previous prime is 63556865527. The next prime is 63556865557.

It is a happy number.

63556865536 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×63556865536² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82246 + ... + 365893.

It is an arithmetic number, because the mean of its divisors is an integer number (3186208179).

Almost surely, 2^63556865536 is an apocalyptic number.

It is an amenable number.

63556865536 is an abundant number, since it is smaller than the sum of its proper divisors (63891461624).

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

63556865536 is an equidigital number, since it uses as much as digits as its factorization.

63556865536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448434 (or 448418 counting only the distinct ones).

The product of its digits is 58320000, while the sum is 58.

The spelling of 63556865536 in words is "sixty-three billion, five hundred fifty-six million, eight hundred sixty-five thousand, five hundred thirty-six".