131689368477 has 12 divisors (see below), whose sum is σ = 195359003580. Its totient is φ = 85420130688.

The previous prime is 131689368443. The next prime is 131689368493. The reversal of 131689368477 is 774863986131.

131689368477 is a `hidden beast` number, since 1 + 3 + 16 + 8 + 93 + 68 + 477 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 107276555961 + 24412812516 = 327531^2 + 156246^2 .

It is not a de Polignac number, because 131689368477 - 2⁶ = 131689368413 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131689368407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 197731452 + ... + 197732117.

It is an arithmetic number, because the mean of its divisors is an integer number (16279916965).

Almost surely, 2^131689368477 is an apocalyptic number.

It is an amenable number.

131689368477 is a deficient number, since it is larger than the sum of its proper divisors (63669635103).

131689368477 is a wasteful number, since it uses less digits than its factorization.

131689368477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395463612 (or 395463609 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 63.

The spelling of 131689368477 in words is "one hundred thirty-one billion, six hundred eighty-nine million, three hundred sixty-eight thousand, four hundred seventy-seven".