11637212928 has 144 divisors (see below), whose sum is σ = 33847462656. Its totient is φ = 3520184320.

The previous prime is 11637212911. The next prime is 11637212957. The reversal of 11637212928 is 82921273611.

It is a super-2 number, since 2×11637212928² (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 11637212928.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7492600 + ... + 7494152.

It is an arithmetic number, because the mean of its divisors is an integer number (235051824).

Almost surely, 2^11637212928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11637212928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16923731328).

11637212928 is an abundant number, since it is smaller than the sum of its proper divisors (22210249728).

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

11637212928 is a wasteful number, since it uses less digits than its factorization.

11637212928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2470 (or 2456 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The spelling of 11637212928 in words is "eleven billion, six hundred thirty-seven million, two hundred twelve thousand, nine hundred twenty-eight".