57821160561 has 4 divisors (see below), whose sum is σ = 77094880752. Its totient is φ = 38547440372.

The previous prime is 57821160557. The next prime is 57821160611. The reversal of 57821160561 is 16506112875.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57821160561 - 2² = 57821160557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57821160361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9636860091 + ... + 9636860096.

It is an arithmetic number, because the mean of its divisors is an integer number (19273720188).

Almost surely, 2^57821160561 is an apocalyptic number.

It is an amenable number.

57821160561 is a deficient number, since it is larger than the sum of its proper divisors (19273720191).

57821160561 is a wasteful number, since it uses less digits than its factorization.

57821160561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19273720190.

The product of its (nonzero) digits is 100800, while the sum is 42.

The spelling of 57821160561 in words is "fifty-seven billion, eight hundred twenty-one million, one hundred sixty thousand, five hundred sixty-one".