57200400385 has 4 divisors (see below), whose sum is σ = 68640480468. Its totient is φ = 45760320304.

The previous prime is 57200400347. The next prime is 57200400401. The reversal of 57200400385 is 58300400275.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6949556496 + 50250843889 = 83364^2 + 224167^2 .

It is a cyclic number.

It is not a de Polignac number, because 57200400385 - 2⁹ = 57200399873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57200400385.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5720040034 + ... + 5720040043.

It is an arithmetic number, because the mean of its divisors is an integer number (17160120117).

Almost surely, 2^57200400385 is an apocalyptic number.

It is an amenable number.

57200400385 is a deficient number, since it is larger than the sum of its proper divisors (11440080083).

57200400385 is a wasteful number, since it uses less digits than its factorization.

57200400385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11440080082.

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 57200400385 in words is "fifty-seven billion, two hundred million, four hundred thousand, three hundred eighty-five".