131620164420 has 24 divisors (see below), whose sum is σ = 368536460544. Its totient is φ = 35098710496.

The previous prime is 131620164391. The next prime is 131620164439. The reversal of 131620164420 is 24461026131.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1096834644 + ... + 1096834763.

It is an arithmetic number, because the mean of its divisors is an integer number (15355685856).

Almost surely, 2^131620164420 is an apocalyptic number.

131620164420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131620164420 is an abundant number, since it is smaller than the sum of its proper divisors (236916296124).

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

131620164420 is a wasteful number, since it uses less digits than its factorization.

131620164420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2193669419 (or 2193669417 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 131620164420 in words is "one hundred thirty-one billion, six hundred twenty million, one hundred sixty-four thousand, four hundred twenty".