131566661500 has 48 divisors (see below), whose sum is σ = 290803627296. Its totient is φ = 51992592000.

The previous prime is 131566661461. The next prime is 131566661521. The reversal of 131566661500 is 5166665131.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1543641 + ... + 1626640.

It is an arithmetic number, because the mean of its divisors is an integer number (6058408902).

Almost surely, 2^131566661500 is an apocalyptic number.

131566661500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131566661500 is an abundant number, since it is smaller than the sum of its proper divisors (159236965796).

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

131566661500 is a wasteful number, since it uses less digits than its factorization.

131566661500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3170383 (or 3170371 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 131566661500 in words is "one hundred thirty-one billion, five hundred sixty-six million, six hundred sixty-one thousand, five hundred".