12920356920456 has 48 divisors (see below), whose sum is σ = 35938380180300. Its totient is φ = 4190386027392.

The previous prime is 12920356920439. The next prime is 12920356920461. The reversal of 12920356920456 is 65402965302921.

12920356920456 is a `hidden beast` number, since 1 + 2 + 9 + 2 + 0 + 3 + 569 + 20 + 4 + 56 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11714423497956 + 1205933422500 = 3422634^2 + 1098150^2 .

It is a super-2 number, since 2×12920356920456² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2424989251 + ... + 2424994578.

Almost surely, 2^{12920356920456} is an apocalyptic number.

It is an amenable number.

12920356920456 is an abundant number, since it is smaller than the sum of its proper divisors (23018023259844).

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

12920356920456 is a wasteful number, since it uses less digits than its factorization.

12920356920456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4849983878 (or 4849983871 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 12920356920456 in words is "twelve trillion, nine hundred twenty billion, three hundred fifty-six million, nine hundred twenty thousand, four hundred fifty-six".