11815657312 has 12 divisors (see below), whose sum is σ = 23262075396. Its totient is φ = 5907828640.

The previous prime is 11815657303. The next prime is 11815657327. The reversal of 11815657312 is 21375651811.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 184619614 + ... + 184619677.

It is an arithmetic number, because the mean of its divisors is an integer number (1938506283).

Almost surely, 2^11815657312 is an apocalyptic number.

It is an amenable number.

11815657312 is a deficient number, since it is larger than the sum of its proper divisors (11446418084).

11815657312 is an equidigital number, since it uses as much as digits as its factorization.

11815657312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369239301 (or 369239293 counting only the distinct ones).

The product of its digits is 50400, while the sum is 40.

The spelling of 11815657312 in words is "eleven billion, eight hundred fifteen million, six hundred fifty-seven thousand, three hundred twelve".