57204217386 has 72 divisors (see below), whose sum is σ = 129362110020. Its totient is φ = 18970422912.

The previous prime is 57204217331. The next prime is 57204217387. The reversal of 57204217386 is 68371240275.

57204217386 is a `hidden beast` number, since 57 + 2 + 0 + 4 + 217 + 386 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 38265228225 + 18938989161 = 195615^2 + 137619^2 .

It is a super-3 number, since 3×57204217386³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57204217387) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2573970 + ... + 2596098.

Almost surely, 2^57204217386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57204217386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64681055010).

57204217386 is an abundant number, since it is smaller than the sum of its proper divisors (72157892634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57204217386 is an equidigital number, since it uses as much as digits as its factorization.

57204217386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22352 (or 22331 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 57204217386 in words is "fifty-seven billion, two hundred four million, two hundred seventeen thousand, three hundred eighty-six".