131686405690 has 32 divisors (see below), whose sum is σ = 271279935360. Its totient is φ = 45085927104.

The previous prime is 131686405663. The next prime is 131686405691. The reversal of 131686405690 is 96504686131.

It is a super-2 number, since 2×131686405690² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131686405691) 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, 1277052 + ... + 1376311.

It is an arithmetic number, because the mean of its divisors is an integer number (8477497980).

Almost surely, 2^131686405690 is an apocalyptic number.

131686405690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131686405690 is an abundant number, since it is smaller than the sum of its proper divisors (139593529670).

131686405690 is a wasteful number, since it uses less digits than its factorization.

131686405690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2654086.

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 131686405690 in words is "one hundred thirty-one billion, six hundred eighty-six million, four hundred five thousand, six hundred ninety".