57218725653 has 8 divisors (see below), whose sum is σ = 76294899168. Its totient is φ = 38144184624.

The previous prime is 57218725637. The next prime is 57218725721. The reversal of 57218725653 is 35652781275.

It is a happy number.

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

It is not a de Polignac number, because 57218725653 - 2⁴ = 57218725637 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 57218725596 and 57218725605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57218725253) 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, 323851 + ... + 468312.

It is an arithmetic number, because the mean of its divisors is an integer number (9536862396).

Almost surely, 2^57218725653 is an apocalyptic number.

It is an amenable number.

57218725653 is a deficient number, since it is larger than the sum of its proper divisors (19076173515).

57218725653 is a wasteful number, since it uses less digits than its factorization.

57218725653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816243.

The product of its digits is 3528000, while the sum is 51.

The spelling of 57218725653 in words is "fifty-seven billion, two hundred eighteen million, seven hundred twenty-five thousand, six hundred fifty-three".