131449085728 has 36 divisors (see below), whose sum is σ = 267407819910. Its totient is φ = 63604381440.

The previous prime is 131449085707. The next prime is 131449085809. The reversal of 131449085728 is 827580944131.

It can be written as a sum of positive squares in only one way, i.e., 126915487504 + 4533598224 = 356252^2 + 67332^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2106493 + ... + 2167996.

Almost surely, 2^131449085728 is an apocalyptic number.

It is an amenable number.

131449085728 is an abundant number, since it is smaller than the sum of its proper divisors (135958734182).

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

131449085728 is an equidigital number, since it uses as much as digits as its factorization.

131449085728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4274561 (or 4274522 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 131449085728 in words is "one hundred thirty-one billion, four hundred forty-nine million, eighty-five thousand, seven hundred twenty-eight".