57126432640 has 32 divisors (see below), whose sum is σ = 136567879560. Its totient is φ = 22850572800.

The previous prime is 57126432617. The next prime is 57126432661. The reversal of 57126432640 is 4623462175.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 57126432593 and 57126432602.

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, 44629386 + ... + 44630665.

Almost surely, 2^57126432640 is an apocalyptic number.

It is an amenable number.

57126432640 is an abundant number, since it is smaller than the sum of its proper divisors (79441446920).

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

57126432640 is an equidigital number, since it uses as much as digits as its factorization.

57126432640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89260070 (or 89260058 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 57126432640 in words is "fifty-seven billion, one hundred twenty-six million, four hundred thirty-two thousand, six hundred forty".