131605796520 has 192 divisors, whose sum is σ = 483884331840. Its totient is φ = 31904409600.

The previous prime is 131605796489. The next prime is 131605796537. The reversal of 131605796520 is 25697506131.

131605796520 is a `hidden beast` number, since 1 + 3 + 16 + 0 + 579 + 65 + 2 + 0 = 666.

It is a super-2 number, since 2×131605796520² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 508521 + ... + 722360.

It is an arithmetic number, because the mean of its divisors is an integer number (2520230895).

Almost surely, 2^131605796520 is an apocalyptic number.

131605796520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131605796520 is an abundant number, since it is smaller than the sum of its proper divisors (352278535320).

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

131605796520 is a wasteful number, since it uses less digits than its factorization.

131605796520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230918 (or 1230902 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The spelling of 131605796520 in words is "one hundred thirty-one billion, six hundred five million, seven hundred ninety-six thousand, five hundred twenty".