57123044661 has 4 divisors (see below), whose sum is σ = 76164059552. Its totient is φ = 38082029772.

The previous prime is 57123044639. The next prime is 57123044681. The reversal of 57123044661 is 16644032175.

It is a happy number.

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 not a de Polignac number, because 57123044661 - 2¹⁹ = 57122520373 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 (57123044621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9520507441 + ... + 9520507446.

It is an arithmetic number, because the mean of its divisors is an integer number (19041014888).

Almost surely, 2^57123044661 is an apocalyptic number.

It is an amenable number.

57123044661 is a deficient number, since it is larger than the sum of its proper divisors (19041014891).

57123044661 is a wasteful number, since it uses less digits than its factorization.

57123044661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19041014890.

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 57123044661 in words is "fifty-seven billion, one hundred twenty-three million, forty-four thousand, six hundred sixty-one".