56857416953221 has 8 divisors (see below), whose sum is σ = 56943198473624. Its totient is φ = 56771639285760.

The previous prime is 56857416953213. The next prime is 56857416953243. The reversal of 56857416953221 is 12235961475865.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 75751552900 + 56781665400321 = 275230^2 + 7535361^2 .

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 56857416953221 - 2³ = 56857416953213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56857416951221) 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, 29288701 + ... + 31169581.

It is an arithmetic number, because the mean of its divisors is an integer number (7117899809203).

Almost surely, 2^{56857416953221} is an apocalyptic number.

It is an amenable number.

56857416953221 is a deficient number, since it is larger than the sum of its proper divisors (85781520403).

56857416953221 is a wasteful number, since it uses less digits than its factorization.

56857416953221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926471.

The product of its digits is 108864000, while the sum is 64.

The spelling of 56857416953221 in words is "fifty-six trillion, eight hundred fifty-seven billion, four hundred sixteen million, nine hundred fifty-three thousand, two hundred twenty-one".