125640420160 has 28 divisors (see below), whose sum is σ = 299181251268. Its totient is φ = 50256167936.

The previous prime is 125640420127. The next prime is 125640420197. The reversal of 125640420160 is 61024046521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 45628377664 + 80012042496 = 213608^2 + 282864^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196312837 + ... + 196313476.

Almost surely, 2^125640420160 is an apocalyptic number.

125640420160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125640420160 is an abundant number, since it is smaller than the sum of its proper divisors (173540831108).

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

125640420160 is an equidigital number, since it uses as much as digits as its factorization.

125640420160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392626330 (or 392626320 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 125640420160 its reverse (61024046521), we get a palindrome (186664466681).

The spelling of 125640420160 in words is "one hundred twenty-five billion, six hundred forty million, four hundred twenty thousand, one hundred sixty".