57438876857 has 4 divisors (see below), whose sum is σ = 57965839140. Its totient is φ = 56911914576.

The previous prime is 57438876799. The next prime is 57438876881. The reversal of 57438876857 is 75867883475.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45729256336 + 11709620521 = 213844^2 + 108211^2 .

It is a cyclic number.

It is not a de Polignac number, because 57438876857 - 2¹² = 57438872761 is a prime.

It is a super-2 number, since 2×57438876857² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57438876457) 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, 263480978 + ... + 263481195.

It is an arithmetic number, because the mean of its divisors is an integer number (14491459785).

Almost surely, 2^57438876857 is an apocalyptic number.

It is an amenable number.

57438876857 is a deficient number, since it is larger than the sum of its proper divisors (526962283).

57438876857 is a wasteful number, since it uses less digits than its factorization.

57438876857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526962282.

The product of its digits is 316108800, while the sum is 68.

The spelling of 57438876857 in words is "fifty-seven billion, four hundred thirty-eight million, eight hundred seventy-six thousand, eight hundred fifty-seven".