57816723509 has 8 divisors (see below), whose sum is σ = 59864958360. Its totient is φ = 55772125696.

The previous prime is 57816723499. The next prime is 57816723521. The reversal of 57816723509 is 90532761875.

It can be written as a sum of positive squares in 4 ways, for example, as 22493400484 + 35323323025 = 149978^2 + 187945^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57816723509 - 2¹² = 57816719413 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 (57816723589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 876884 + ... + 940509.

It is an arithmetic number, because the mean of its divisors is an integer number (7483119795).

Almost surely, 2^57816723509 is an apocalyptic number.

It is an amenable number.

57816723509 is a deficient number, since it is larger than the sum of its proper divisors (2048234851).

57816723509 is a wasteful number, since it uses less digits than its factorization.

57816723509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818519.

The product of its (nonzero) digits is 3175200, while the sum is 53.

The spelling of 57816723509 in words is "fifty-seven billion, eight hundred sixteen million, seven hundred twenty-three thousand, five hundred nine".