57646721 has 8 divisors (see below), whose sum is σ = 63465600. Its totient is φ = 51924240.

The previous prime is 57646709. The next prime is 57646727. The reversal of 57646721 is 12764675.

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 57646721 - 2⁶ = 57646657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57646727) 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, 22841 + ... + 25238.

It is an arithmetic number, because the mean of its divisors is an integer number (7933200).

Almost surely, 2^57646721 is an apocalyptic number.

It is an amenable number.

57646721 is a deficient number, since it is larger than the sum of its proper divisors (5818879).

57646721 is a wasteful number, since it uses less digits than its factorization.

57646721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48199.

The product of its digits is 70560, while the sum is 38.

The square root of 57646721 is about 7592.5437766272. The cubic root of 57646721 is about 386.3001437467.

The spelling of 57646721 in words is "fifty-seven million, six hundred forty-six thousand, seven hundred twenty-one".