63749870920 has 16 divisors (see below), whose sum is σ = 143437209660. Its totient is φ = 25499948352.

The previous prime is 63749870903. The next prime is 63749870999. The reversal of 63749870920 is 2907894736.

It can be written as a sum of positive squares in 2 ways, for example, as 59519409156 + 4230461764 = 243966^2 + 65042^2 .

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, 796873347 + ... + 796873426.

Almost surely, 2^63749870920 is an apocalyptic number.

It is an amenable number.

63749870920 is an abundant number, since it is smaller than the sum of its proper divisors (79687338740).

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

63749870920 is a wasteful number, since it uses less digits than its factorization.

63749870920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593746784 (or 1593746780 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 55.

The spelling of 63749870920 in words is "sixty-three billion, seven hundred forty-nine million, eight hundred seventy thousand, nine hundred twenty".