125405532440 has 32 divisors (see below), whose sum is σ = 282172572000. Its totient is φ = 50160413184.

The previous prime is 125405532431. The next prime is 125405532521. The reversal of 125405532440 is 44235504521.

It is a self number, because there is not a number n which added to its sum of digits gives 125405532440.

It is a congruent 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, 2006381 + ... + 2067939.

It is an arithmetic number, because the mean of its divisors is an integer number (8817892875).

Almost surely, 2^125405532440 is an apocalyptic number.

125405532440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125405532440 is an abundant number, since it is smaller than the sum of its proper divisors (156767039560).

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

125405532440 is a wasteful number, since it uses less digits than its factorization.

125405532440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112499 (or 112495 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

The spelling of 125405532440 in words is "one hundred twenty-five billion, four hundred five million, five hundred thirty-two thousand, four hundred forty".