125322581440 has 56 divisors (see below), whose sum is σ = 341056459872. Its totient is φ = 42967741440.

The previous prime is 125322581383. The next prime is 125322581467. The reversal of 125322581440 is 44185223521.

It is a tau number, because it is divible by the number of its divisors (56).

It is a self number, because there is not a number n which added to its sum of digits gives 125322581440.

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, 27971551 + ... + 27976030.

Almost surely, 2^125322581440 is an apocalyptic number.

125322581440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125322581440 is an abundant number, since it is smaller than the sum of its proper divisors (215733878432).

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

125322581440 is an equidigital number, since it uses as much as digits as its factorization.

125322581440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55947605 (or 55947595 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 37.

The spelling of 125322581440 in words is "one hundred twenty-five billion, three hundred twenty-two million, five hundred eighty-one thousand, four hundred forty".