125440455520 has 24 divisors (see below), whose sum is σ = 296353076544. Its totient is φ = 50176182144.

The previous prime is 125440455431. The next prime is 125440455533. The reversal of 125440455520 is 25554044521.

It is a self number, because there is not a number n which added to its sum of digits gives 125440455520.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392001264 + ... + 392001583.

It is an arithmetic number, because the mean of its divisors is an integer number (12348044856).

Almost surely, 2^125440455520 is an apocalyptic number.

125440455520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125440455520 is an abundant number, since it is smaller than the sum of its proper divisors (170912621024).

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

125440455520 is an equidigital number, since it uses as much as digits as its factorization.

125440455520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784002862 (or 784002854 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 37.

The spelling of 125440455520 in words is "one hundred twenty-five billion, four hundred forty million, four hundred fifty-five thousand, five hundred twenty".