57008172561 has 4 divisors (see below), whose sum is σ = 76010896752. Its totient is φ = 38005448372.

The previous prime is 57008172547. The next prime is 57008172607. The reversal of 57008172561 is 16527180075.

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 57008172561 - 2¹⁰ = 57008171537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57008172161) 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, 9501362091 + ... + 9501362096.

It is an arithmetic number, because the mean of its divisors is an integer number (19002724188).

Almost surely, 2^57008172561 is an apocalyptic number.

It is an amenable number.

57008172561 is a deficient number, since it is larger than the sum of its proper divisors (19002724191).

57008172561 is a wasteful number, since it uses less digits than its factorization.

57008172561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19002724190.

The product of its (nonzero) digits is 117600, while the sum is 42.

The spelling of 57008172561 in words is "fifty-seven billion, eight million, one hundred seventy-two thousand, five hundred sixty-one".