12911909836 has 48 divisors (see below), whose sum is σ = 27900936000. Its totient is φ = 5208155904.

The previous prime is 12911909797. The next prime is 12911909849. The reversal of 12911909836 is 63890911921.

It is a super-2 number, since 2×12911909836² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 12911909836.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253471 + ... + 300118.

It is an arithmetic number, because the mean of its divisors is an integer number (581269500).

Almost surely, 2^12911909836 is an apocalyptic number.

It is an amenable number.

12911909836 is an abundant number, since it is smaller than the sum of its proper divisors (14989026164).

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

12911909836 is a wasteful number, since it uses less digits than its factorization.

12911909836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553631 (or 553615 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 49.

The spelling of 12911909836 in words is "twelve billion, nine hundred eleven million, nine hundred nine thousand, eight hundred thirty-six".