57164765221 has 8 divisors (see below), whose sum is σ = 57232643904. Its totient is φ = 57096923520.

The previous prime is 57164765209. The next prime is 57164765291. The reversal of 57164765221 is 12256746175.

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 57164765221 - 2¹⁹ = 57164240933 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 (57164765291) 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, 4103550 + ... + 4117456.

It is an arithmetic number, because the mean of its divisors is an integer number (7154080488).

Almost surely, 2^57164765221 is an apocalyptic number.

It is an amenable number.

57164765221 is a deficient number, since it is larger than the sum of its proper divisors (67878683).

57164765221 is a wasteful number, since it uses less digits than its factorization.

57164765221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18491.

The product of its digits is 705600, while the sum is 46.

The spelling of 57164765221 in words is "fifty-seven billion, one hundred sixty-four million, seven hundred sixty-five thousand, two hundred twenty-one".