11657540612 has 12 divisors (see below), whose sum is σ = 20413449756. Its totient is φ = 5825126400.

The previous prime is 11657540567. The next prime is 11657540617. The reversal of 11657540612 is 21604575611.

It can be written as a sum of positive squares in 2 ways, for example, as 11604891076 + 52649536 = 107726^2 + 7256^2 .

It is not an unprimeable number, because it can be changed into a prime (11657540617) 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, 903773 + ... + 916580.

It is an arithmetic number, because the mean of its divisors is an integer number (1701120813).

Almost surely, 2^11657540612 is an apocalyptic number.

It is an amenable number.

11657540612 is a deficient number, since it is larger than the sum of its proper divisors (8755909144).

11657540612 is a wasteful number, since it uses less digits than its factorization.

11657540612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821958 (or 1821956 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 11657540612 in words is "eleven billion, six hundred fifty-seven million, five hundred forty thousand, six hundred twelve".