57656105221 has 32 divisors (see below), whose sum is σ = 69404848128. Its totient is φ = 47197391040.

The previous prime is 57656105219. The next prime is 57656105239. The reversal of 57656105221 is 12250165675.

It is a cyclic number.

It is not a de Polignac number, because 57656105221 - 2¹ = 57656105219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57656105821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2049376 + ... + 2077318.

It is an arithmetic number, because the mean of its divisors is an integer number (2168901504).

Almost surely, 2^57656105221 is an apocalyptic number.

It is an amenable number.

57656105221 is a deficient number, since it is larger than the sum of its proper divisors (11748742907).

57656105221 is a wasteful number, since it uses less digits than its factorization.

57656105221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28321.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 57656105221 in words is "fifty-seven billion, six hundred fifty-six million, one hundred five thousand, two hundred twenty-one".