12511664 has 20 divisors (see below), whose sum is σ = 26445480. Its totient is φ = 5687040.

The previous prime is 12511663. The next prime is 12511687. The reversal of 12511664 is 46611521.

It is not an unprimeable number, because it can be changed into a prime (12511663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35369 + ... + 35720.

It is an arithmetic number, because the mean of its divisors is an integer number (1322274).

Almost surely, 2^12511664 is an apocalyptic number.

It is an amenable number.

12511664 is an abundant number, since it is smaller than the sum of its proper divisors (13933816).

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

12511664 is a wasteful number, since it uses less digits than its factorization.

12511664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71108 (or 71102 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 12511664 is about 3537.1830600069. The cubic root of 12511664 is about 232.1516052291.

The spelling of 12511664 in words is "twelve million, five hundred eleven thousand, six hundred sixty-four".