57236021656 has 16 divisors (see below), whose sum is σ = 117073680840. Its totient is φ = 26016373440.

The previous prime is 57236021641. The next prime is 57236021671. The reversal of 57236021656 is 65612063275.

It is an interprime number because it is at equal distance from previous prime (57236021641) and next prime (57236021671).

It is a super-2 number, since 2×57236021656² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325204581 + ... + 325204756.

Almost surely, 2^57236021656 is an apocalyptic number.

It is an amenable number.

57236021656 is an abundant number, since it is smaller than the sum of its proper divisors (59837659184).

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

57236021656 is a wasteful number, since it uses less digits than its factorization.

57236021656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650409354 (or 650409350 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 57236021656 in words is "fifty-seven billion, two hundred thirty-six million, twenty-one thousand, six hundred fifty-six".