131778157047 has 16 divisors (see below), whose sum is σ = 183791834880. Its totient is φ = 83826971712.

The previous prime is 131778157019. The next prime is 131778157067. The reversal of 131778157047 is 740751877131.

It is a happy number.

It is not a de Polignac number, because 131778157047 - 2²⁰ = 131777108471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131778157067) 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, 2306533 + ... + 2362974.

It is an arithmetic number, because the mean of its divisors is an integer number (11486989680).

Almost surely, 2^131778157047 is an apocalyptic number.

131778157047 is a deficient number, since it is larger than the sum of its proper divisors (52013677833).

131778157047 is a wasteful number, since it uses less digits than its factorization.

131778157047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4669942.

The product of its (nonzero) digits is 1152480, while the sum is 51.

The spelling of 131778157047 in words is "one hundred thirty-one billion, seven hundred seventy-eight million, one hundred fifty-seven thousand, forty-seven".