57127537661 has 4 divisors (see below), whose sum is σ = 57134652000. Its totient is φ = 57120423324.

The previous prime is 57127537619. The next prime is 57127537667. The reversal of 57127537661 is 16673572175.

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 57127537661 - 2¹⁰ = 57127536637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57127537667) 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, 3545111 + ... + 3561188.

It is an arithmetic number, because the mean of its divisors is an integer number (14283663000).

Almost surely, 2^57127537661 is an apocalyptic number.

It is an amenable number.

57127537661 is a deficient number, since it is larger than the sum of its proper divisors (7114339).

57127537661 is an equidigital number, since it uses as much as digits as its factorization.

57127537661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7114338.

The product of its digits is 1852200, while the sum is 50.

The spelling of 57127537661 in words is "fifty-seven billion, one hundred twenty-seven million, five hundred thirty-seven thousand, six hundred sixty-one".