131662761681 has 8 divisors (see below), whose sum is σ = 191509471584. Its totient is φ = 79795613120.

The previous prime is 131662761667. The next prime is 131662761683. The reversal of 131662761681 is 186167266131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131662761681 - 2¹⁷ = 131662630609 is a prime.

It is a super-2 number, since 2×131662761681² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131662761681.

It is not an unprimeable number, because it can be changed into a prime (131662761683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1994890296 + ... + 1994890361.

It is an arithmetic number, because the mean of its divisors is an integer number (23938683948).

Almost surely, 2^131662761681 is an apocalyptic number.

131662761681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131662761681 is a deficient number, since it is larger than the sum of its proper divisors (59846709903).

131662761681 is a wasteful number, since it uses less digits than its factorization.

131662761681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3989780671.

The product of its digits is 435456, while the sum is 48.

The spelling of 131662761681 in words is "one hundred thirty-one billion, six hundred sixty-two million, seven hundred sixty-one thousand, six hundred eighty-one".