63728799744 has 52 divisors (see below), whose sum is σ = 169922753696. Its totient is φ = 21242929152.

The previous prime is 63728799737. The next prime is 63728799779. The reversal of 63728799744 is 44799782736.

It is a super-2 number, since 2×63728799744² (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, 2580844 + ... + 2605419.

Almost surely, 2^63728799744 is an apocalyptic number.

63728799744 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

63728799744 is an abundant number, since it is smaller than the sum of its proper divisors (106193953952).

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

63728799744 is an equidigital number, since it uses as much as digits as its factorization.

63728799744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5186290 (or 5186268 counting only the distinct ones).

The product of its digits is 128024064, while the sum is 66.

The spelling of 63728799744 in words is "sixty-three billion, seven hundred twenty-eight million, seven hundred ninety-nine thousand, seven hundred forty-four".