57704366202921 has 9 divisors (see below), whose sum is σ = 83350784099479. Its totient is φ = 38469562275936.

The previous prime is 57704366202913. The next prime is 57704366202929. The reversal of 57704366202921 is 12920266340775.

The square root of 57704366202921 is 7596339.

It is a perfect power (a square), and thus also a powerful number.

57704366202921 is a `hidden beast` number, since 5 + 7 + 7 + 0 + 4 + 3 + 6 + 620 + 2 + 9 + 2 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (57704366202913) and next prime (57704366202929).

It can be written as a sum of positive squares in only one way, i.e., 43268439515625 + 14435926687296 = 6577875^2 + 3799464^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 57704366202921 - 2³ = 57704366202913 is a prime.

It is a super-2 number, since 2×57704366202921² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57704366202929) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 21522961 + ... + 24055073.

Almost surely, 2^{57704366202921} is an apocalyptic number.

57704366202921 is the 7596339-th square number.

57704366202921 is the 3798170-th centered octagonal number.

It is an amenable number.

57704366202921 is a deficient number, since it is larger than the sum of its proper divisors (25646417896558).

57704366202921 is an frugal number, since it uses more digits than its factorization.

57704366202921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5064232 (or 2532116 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 54.

The spelling of 57704366202921 in words is "fifty-seven trillion, seven hundred four billion, three hundred sixty-six million, two hundred two thousand, nine hundred twenty-one".