125401363640 has 128 divisors (see below), whose sum is σ = 330100531200. Its totient is φ = 41980439040.

The previous prime is 125401363639. The next prime is 125401363667. The reversal of 125401363640 is 46363104521.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 125401363640.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5660906 + ... + 5683014.

It is an arithmetic number, because the mean of its divisors is an integer number (2578910400).

Almost surely, 2^125401363640 is an apocalyptic number.

125401363640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125401363640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165050265600).

125401363640 is an abundant number, since it is smaller than the sum of its proper divisors (204699167560).

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

125401363640 is a wasteful number, since it uses less digits than its factorization.

125401363640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22605 (or 22601 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 125401363640 in words is "one hundred twenty-five billion, four hundred one million, three hundred sixty-three thousand, six hundred forty".