131778056785784 has 16 divisors (see below), whose sum is σ = 247086470517720. Its totient is φ = 65888331314400.

The previous prime is 131778056785751. The next prime is 131778056785801. The reversal of 131778056785784 is 487587650877131.

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, 86330942 + ... + 87844109.

Almost surely, 2^{131778056785784} is an apocalyptic number.

It is an amenable number.

131778056785784 is a deficient number, since it is larger than the sum of its proper divisors (115308413731936).

131778056785784 is a wasteful number, since it uses less digits than its factorization.

131778056785784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174269630 (or 174269626 counting only the distinct ones).

The product of its (nonzero) digits is 2212761600, while the sum is 77.

The spelling of 131778056785784 in words is "one hundred thirty-one trillion, seven hundred seventy-eight billion, fifty-six million, seven hundred eighty-five thousand, seven hundred eighty-four".