131660775636 has 144 divisors (see below), whose sum is σ = 355722591168. Its totient is φ = 37749504000.

The previous prime is 131660775593. The next prime is 131660775641. The reversal of 131660775636 is 636577066131.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3463171 + ... + 3500981.

It is an arithmetic number, because the mean of its divisors is an integer number (2470295772).

Almost surely, 2^131660775636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131660775636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177861295584).

131660775636 is an abundant number, since it is smaller than the sum of its proper divisors (224061815532).

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

131660775636 is a wasteful number, since it uses less digits than its factorization.

131660775636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37962 (or 37947 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 51.

The spelling of 131660775636 in words is "one hundred thirty-one billion, six hundred sixty million, seven hundred seventy-five thousand, six hundred thirty-six".