125731099400 has 24 divisors (see below), whose sum is σ = 292324806570. Its totient is φ = 50292439680.

The previous prime is 125731099381. The next prime is 125731099411. The reversal of 125731099400 is 4990137521.

It can be written as a sum of positive squares in 3 ways, for example, as 116317830916 + 9413268484 = 341054^2 + 97022^2 .

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, 314327549 + ... + 314327948.

Almost surely, 2^125731099400 is an apocalyptic number.

125731099400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125731099400 is an abundant number, since it is smaller than the sum of its proper divisors (166593707170).

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

125731099400 is a wasteful number, since it uses less digits than its factorization.

125731099400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628655513 (or 628655504 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 41.

The spelling of 125731099400 in words is "one hundred twenty-five billion, seven hundred thirty-one million, ninety-nine thousand, four hundred".