57531887513 has 4 divisors (see below), whose sum is σ = 57544800180. Its totient is φ = 57518974848.

The previous prime is 57531887489. The next prime is 57531887533. The reversal of 57531887513 is 31578813575.

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 49891029769 + 7640857744 = 223363^2 + 87412^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57531887513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57531887533) 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, 6449648 + ... + 6458561.

It is an arithmetic number, because the mean of its divisors is an integer number (14386200045).

Almost surely, 2^57531887513 is an apocalyptic number.

It is an amenable number.

57531887513 is a deficient number, since it is larger than the sum of its proper divisors (12912667).

57531887513 is a wasteful number, since it uses less digits than its factorization.

57531887513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12912666.

The product of its digits is 3528000, while the sum is 53.

The spelling of 57531887513 in words is "fifty-seven billion, five hundred thirty-one million, eight hundred eighty-seven thousand, five hundred thirteen".