11915315512 has 8 divisors (see below), whose sum is σ = 22341216600. Its totient is φ = 5957657752.

The previous prime is 11915315509. The next prime is 11915315519. The reversal of 11915315512 is 21551351911.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11915315519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 744707212 + ... + 744707227.

It is an arithmetic number, because the mean of its divisors is an integer number (2792652075).

Almost surely, 2^11915315512 is an apocalyptic number.

It is an amenable number.

11915315512 is a deficient number, since it is larger than the sum of its proper divisors (10425901088).

11915315512 is a wasteful number, since it uses less digits than its factorization.

11915315512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489414445 (or 1489414441 counting only the distinct ones).

The product of its digits is 6750, while the sum is 34.

The spelling of 11915315512 in words is "eleven billion, nine hundred fifteen million, three hundred fifteen thousand, five hundred twelve".