63955855936 has 28 divisors (see below), whose sum is σ = 145042745728. Its totient is φ = 27409652352.

The previous prime is 63955855933. The next prime is 63955855949.

63955855936 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (64).

It is not an unprimeable number, because it can be changed into a prime (63955855933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71378856 + ... + 71379751.

Almost surely, 2^63955855936 is an apocalyptic number.

It is an amenable number.

63955855936 is an abundant number, since it is smaller than the sum of its proper divisors (81086889792).

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

63955855936 is a wasteful number, since it uses less digits than its factorization.

63955855936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142758626 (or 142758616 counting only the distinct ones).

The product of its digits is 131220000, while the sum is 64.

The spelling of 63955855936 in words is "sixty-three billion, nine hundred fifty-five million, eight hundred fifty-five thousand, nine hundred thirty-six".