131285527920 has 80 divisors (see below), whose sum is σ = 452205714720. Its totient is φ = 35009473536.

The previous prime is 131285527883. The next prime is 131285527931. The reversal of 131285527920 is 29725582131.

131285527920 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 8 + 552 + 7 + 92 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

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

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, 30388009 + ... + 30392328.

It is an arithmetic number, because the mean of its divisors is an integer number (5652571434).

Almost surely, 2^131285527920 is an apocalyptic number.

131285527920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131285527920 is an abundant number, since it is smaller than the sum of its proper divisors (320920186800).

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

131285527920 is a wasteful number, since it uses less digits than its factorization.

131285527920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60780359 (or 60780347 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 131285527920 in words is "one hundred thirty-one billion, two hundred eighty-five million, five hundred twenty-seven thousand, nine hundred twenty".