131507664461 has 4 divisors (see below), whose sum is σ = 131513496000. Its totient is φ = 131501832924.

The previous prime is 131507664427. The next prime is 131507664487. The reversal of 131507664461 is 164466705131.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 164466705131 = 92317 ⋅1781543.

It is a cyclic number.

It is not a de Polignac number, because 131507664461 - 2³⁰ = 130433922637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131507664161) 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, 2881811 + ... + 2927088.

It is an arithmetic number, because the mean of its divisors is an integer number (32878374000).

Almost surely, 2^131507664461 is an apocalyptic number.

It is an amenable number.

131507664461 is a deficient number, since it is larger than the sum of its proper divisors (5831539).

131507664461 is an equidigital number, since it uses as much as digits as its factorization.

131507664461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5831538.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 131507664461 in words is "one hundred thirty-one billion, five hundred seven million, six hundred sixty-four thousand, four hundred sixty-one".