12991856090 has 16 divisors (see below), whose sum is σ = 23882902272. Its totient is φ = 5086173264.

The previous prime is 12991856077. The next prime is 12991856173. The reversal of 12991856090 is 9065819921.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13820654 + ... + 13821593.

It is an arithmetic number, because the mean of its divisors is an integer number (1492681392).

Almost surely, 2^12991856090 is an apocalyptic number.

12991856090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12991856090 is a deficient number, since it is larger than the sum of its proper divisors (10891046182).

12991856090 is a wasteful number, since it uses less digits than its factorization.

12991856090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27642301.

The product of its (nonzero) digits is 349920, while the sum is 50.

The spelling of 12991856090 in words is "twelve billion, nine hundred ninety-one million, eight hundred fifty-six thousand, ninety".