131615879665542 has 64 divisors (see below), whose sum is σ = 265182565340160. Its totient is φ = 43548088887296.

The previous prime is 131615879665519. The next prime is 131615879665547. The reversal of 131615879665542 is 245566978516131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131615879665547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1560922768 + ... + 1561007084.

It is an arithmetic number, because the mean of its divisors is an integer number (4143477583440).

Almost surely, 2^{131615879665542} is an apocalyptic number.

131615879665542 is an abundant number, since it is smaller than the sum of its proper divisors (133566685674618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131615879665542 is a wasteful number, since it uses less digits than its factorization.

131615879665542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88045.

The product of its digits is 326592000, while the sum is 69.

The spelling of 131615879665542 in words is "one hundred thirty-one trillion, six hundred fifteen billion, eight hundred seventy-nine million, six hundred sixty-five thousand, five hundred forty-two".