131978256990904 has 16 divisors (see below), whose sum is σ = 247459359704400. Its totient is φ = 65989094403072.

The previous prime is 131978256990809. The next prime is 131978256990911. The reversal of 131978256990904 is 409099652879131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20998557 + ... + 26549875.

It is an arithmetic number, because the mean of its divisors is an integer number (15466209981525).

It is a 1-persistent number, because it is pandigital, but 2⋅131978256990904 = 263956513981808 is not.

Almost surely, 2^{131978256990904} is an apocalyptic number.

It is an amenable number.

131978256990904 is a deficient number, since it is larger than the sum of its proper divisors (115481102713496).

131978256990904 is a wasteful number, since it uses less digits than its factorization.

131978256990904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8523102 (or 8523098 counting only the distinct ones).

The product of its (nonzero) digits is 264539520, while the sum is 73.

The spelling of 131978256990904 in words is "one hundred thirty-one trillion, nine hundred seventy-eight billion, two hundred fifty-six million, nine hundred ninety thousand, nine hundred four".