131439746577 has 4 divisors (see below), whose sum is σ = 175252995440. Its totient is φ = 87626497716.

The previous prime is 131439746573. The next prime is 131439746587. The reversal of 131439746577 is 775647934131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 131439746577 - 2² = 131439746573 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131439746573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21906624427 + ... + 21906624432.

It is an arithmetic number, because the mean of its divisors is an integer number (43813248860).

Almost surely, 2^131439746577 is an apocalyptic number.

It is an amenable number.

131439746577 is a deficient number, since it is larger than the sum of its proper divisors (43813248863).

131439746577 is an equidigital number, since it uses as much as digits as its factorization.

131439746577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43813248862.

The product of its digits is 13335840, while the sum is 57.

The spelling of 131439746577 in words is "one hundred thirty-one billion, four hundred thirty-nine million, seven hundred forty-six thousand, five hundred seventy-seven".