63955809036 has 48 divisors (see below), whose sum is σ = 189498695680. Its totient is φ = 18273088080.

The previous prime is 63955809031. The next prime is 63955809109. The reversal of 63955809036 is 63090855936.

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 (63955809031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42298060 + ... + 42299571.

Almost surely, 2^63955809036 is an apocalyptic number.

It is an amenable number.

63955809036 is an abundant number, since it is smaller than the sum of its proper divisors (125542886644).

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

63955809036 is a wasteful number, since it uses less digits than its factorization.

63955809036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84597651 (or 84597643 counting only the distinct ones).

The product of its (nonzero) digits is 5248800, while the sum is 54.

The spelling of 63955809036 in words is "sixty-three billion, nine hundred fifty-five million, eight hundred nine thousand, thirty-six".