131132809620 has 36 divisors (see below), whose sum is σ = 397769523060. Its totient is φ = 34968749184.

The previous prime is 131132809607. The next prime is 131132809663. The reversal of 131132809620 is 26908231131.

131132809620 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 3 + 28 + 0 + 9 + 620 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22561241616 + 108571568004 = 150204^2 + 329502^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 364257625 + ... + 364257984.

Almost surely, 2^131132809620 is an apocalyptic number.

131132809620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131132809620 is an abundant number, since it is smaller than the sum of its proper divisors (266636713440).

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

131132809620 is a wasteful number, since it uses less digits than its factorization.

131132809620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728515624 (or 728515619 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 131132809620 in words is "one hundred thirty-one billion, one hundred thirty-two million, eight hundred nine thousand, six hundred twenty".