57164776781 has 4 divisors (see below), whose sum is σ = 65331173472. Its totient is φ = 48998380092.

The previous prime is 57164776777. The next prime is 57164776811. The reversal of 57164776781 is 18767746175.

57164776781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 57164776781 - 2² = 57164776777 is a prime.

It is a super-2 number, since 2×57164776781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57164776781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57164776381) 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, 4083198335 + ... + 4083198348.

It is an arithmetic number, because the mean of its divisors is an integer number (16332793368).

Almost surely, 2^57164776781 is an apocalyptic number.

It is an amenable number.

57164776781 is a deficient number, since it is larger than the sum of its proper divisors (8166396691).

57164776781 is an equidigital number, since it uses as much as digits as its factorization.

57164776781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8166396690.

The product of its digits is 13829760, while the sum is 59.

The spelling of 57164776781 in words is "fifty-seven billion, one hundred sixty-four million, seven hundred seventy-six thousand, seven hundred eighty-one".