12909515774 has 4 divisors (see below), whose sum is σ = 19364273664. Its totient is φ = 6454757886.

The previous prime is 12909515761. The next prime is 12909515809. The reversal of 12909515774 is 47751590921.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3227378942 + ... + 3227378945.

It is an arithmetic number, because the mean of its divisors is an integer number (4841068416).

Almost surely, 2^12909515774 is an apocalyptic number.

12909515774 is a deficient number, since it is larger than the sum of its proper divisors (6454757890).

12909515774 is an equidigital number, since it uses as much as digits as its factorization.

12909515774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6454757889.

The product of its (nonzero) digits is 793800, while the sum is 50.

The spelling of 12909515774 in words is "twelve billion, nine hundred nine million, five hundred fifteen thousand, seven hundred seventy-four".