57256252005721 has 8 divisors (see below), whose sum is σ = 58195003689864. Its totient is φ = 56317504341120.

The previous prime is 57256252005713. The next prime is 57256252005727. The reversal of 57256252005721 is 12750025265275.

It can be written as a sum of positive squares in 4 ways, for example, as 243408036496 + 57012843969225 = 493364^2 + 7550685^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57256252005721 - 2³ = 57256252005713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57256252005727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44394261 + ... + 45665773.

It is an arithmetic number, because the mean of its divisors is an integer number (7274375461233).

Almost surely, 2^{57256252005721} is an apocalyptic number.

It is an amenable number.

57256252005721 is a deficient number, since it is larger than the sum of its proper divisors (938751684143).

57256252005721 is a wasteful number, since it uses less digits than its factorization.

57256252005721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009771.

The product of its (nonzero) digits is 2940000, while the sum is 49.

The spelling of 57256252005721 in words is "fifty-seven trillion, two hundred fifty-six billion, two hundred fifty-two million, five thousand, seven hundred twenty-one".