57218318866501 has 4 divisors (see below), whose sum is σ = 61619728010092. Its totient is φ = 52816909722912.

The previous prime is 57218318866453. The next prime is 57218318866627. The reversal of 57218318866501 is 10566881381275.

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 10348220428225 + 46870098438276 = 3216865^2 + 6846174^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57218318866501 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 57218318866501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57218318860501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2200704571776 + ... + 2200704571801.

It is an arithmetic number, because the mean of its divisors is an integer number (15404932002523).

Almost surely, 2^{57218318866501} is an apocalyptic number.

It is an amenable number.

57218318866501 is a deficient number, since it is larger than the sum of its proper divisors (4401409143591).

57218318866501 is a wasteful number, since it uses less digits than its factorization.

57218318866501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4401409143590.

The product of its (nonzero) digits is 19353600, while the sum is 61.

The spelling of 57218318866501 in words is "fifty-seven trillion, two hundred eighteen billion, three hundred eighteen million, eight hundred sixty-six thousand, five hundred one".