11557947432 has 32 divisors (see below), whose sum is σ = 29301842880. Its totient is φ = 3798385920.

The previous prime is 11557947413. The next prime is 11557947451. The reversal of 11557947432 is 23474975511.

It is an interprime number because it is at equal distance from previous prime (11557947413) and next prime (11557947451).

It is a super-2 number, since 2×11557947432² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3389713 + ... + 3393120.

It is an arithmetic number, because the mean of its divisors is an integer number (915682590).

Almost surely, 2^11557947432 is an apocalyptic number.

11557947432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11557947432 is an abundant number, since it is smaller than the sum of its proper divisors (17743895448).

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

11557947432 is a wasteful number, since it uses less digits than its factorization.

11557947432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6782913 (or 6782909 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 48.

The spelling of 11557947432 in words is "eleven billion, five hundred fifty-seven million, nine hundred forty-seven thousand, four hundred thirty-two".