12551920045657 has 16 divisors (see below), whose sum is σ = 13444229601792. Its totient is φ = 11691085067200.

The previous prime is 12551920045603. The next prime is 12551920045699. The reversal of 12551920045657 is 75654002915521.

It is not a de Polignac number, because 12551920045657 - 2³⁹ = 12002164231769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12551920045157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29257594 + ... + 29683507.

It is an arithmetic number, because the mean of its divisors is an integer number (840264350112).

Almost surely, 2^{12551920045657} is an apocalyptic number.

It is an amenable number.

12551920045657 is a deficient number, since it is larger than the sum of its proper divisors (892309556135).

12551920045657 is a wasteful number, since it uses less digits than its factorization.

12551920045657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58941368.

The product of its (nonzero) digits is 3780000, while the sum is 52.

The spelling of 12551920045657 in words is "twelve trillion, five hundred fifty-one billion, nine hundred twenty million, forty-five thousand, six hundred fifty-seven".