131637725420 has 24 divisors (see below), whose sum is σ = 276740066400. Its totient is φ = 52597786752.

The previous prime is 131637725413. The next prime is 131637725447. The reversal of 131637725420 is 24527736131.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3562625 + ... + 3599384.

It is an arithmetic number, because the mean of its divisors is an integer number (11530836100).

Almost surely, 2^131637725420 is an apocalyptic number.

131637725420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131637725420 is an abundant number, since it is smaller than the sum of its proper divisors (145102340980).

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

131637725420 is a wasteful number, since it uses less digits than its factorization.

131637725420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7162937 (or 7162935 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 41.

The spelling of 131637725420 in words is "one hundred thirty-one billion, six hundred thirty-seven million, seven hundred twenty-five thousand, four hundred twenty".