131500126728 has 32 divisors (see below), whose sum is σ = 365278130400. Its totient is φ = 43833375504.

The previous prime is 131500126717. The next prime is 131500126733. The reversal of 131500126728 is 827621005131.

131500126728 is a `hidden beast` number, since 1 + 3 + 1 + 500 + 126 + 7 + 28 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 131500126692 and 131500126701.

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, 304398226 + ... + 304398657.

It is an arithmetic number, because the mean of its divisors is an integer number (11414941575).

Almost surely, 2^131500126728 is an apocalyptic number.

131500126728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

131500126728 is an abundant number, since it is smaller than the sum of its proper divisors (233778003672).

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

131500126728 is a wasteful number, since it uses less digits than its factorization.

131500126728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608796898 (or 608796888 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 131500126728 in words is "one hundred thirty-one billion, five hundred million, one hundred twenty-six thousand, seven hundred twenty-eight".