11601664125 has 32 divisors (see below), whose sum is σ = 19632412800. Its totient is φ = 6082668800.

The previous prime is 11601664121. The next prime is 11601664169. The reversal of 11601664125 is 52146610611.

It is not a de Polignac number, because 11601664125 - 2² = 11601664121 is a prime.

It is a super-2 number, since 2×11601664125² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11601664121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 240060 + ... + 284309.

It is an arithmetic number, because the mean of its divisors is an integer number (613512900).

Almost surely, 2^11601664125 is an apocalyptic number.

11601664125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11601664125 is a deficient number, since it is larger than the sum of its proper divisors (8030748675).

11601664125 is an equidigital number, since it uses as much as digits as its factorization.

11601664125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524446 (or 524436 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The spelling of 11601664125 in words is "eleven billion, six hundred one million, six hundred sixty-four thousand, one hundred twenty-five".