11638499072 has 36 divisors (see below), whose sum is σ = 23352005040. Its totient is φ = 5789073408.

The previous prime is 11638499027. The next prime is 11638499099. The reversal of 11638499072 is 27099483611.

It is a super-2 number, since 2×11638499072² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11638499072.

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, 68372 + ... + 167187.

Almost surely, 2^11638499072 is an apocalyptic number.

It is an amenable number.

11638499072 is an abundant number, since it is smaller than the sum of its proper divisors (11713505968).

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

11638499072 is an equidigital number, since it uses as much as digits as its factorization.

11638499072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235768 (or 235754 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 11638499072 in words is "eleven billion, six hundred thirty-eight million, four hundred ninety-nine thousand, seventy-two".