51697118593 has 4 divisors (see below), whose sum is σ = 51889301460. Its totient is φ = 51504935728.

The previous prime is 51697118579. The next prime is 51697118623. The reversal of 51697118593 is 39581179615.

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 14547254544 + 37149864049 = 120612^2 + 192743^2 .

It is a cyclic number.

It is not a de Polignac number, because 51697118593 - 2²⁹ = 51160247681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51697118513) 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, 96091030 + ... + 96091567.

It is an arithmetic number, because the mean of its divisors is an integer number (12972325365).

Almost surely, 2^51697118593 is an apocalyptic number.

It is an amenable number.

51697118593 is a deficient number, since it is larger than the sum of its proper divisors (192182867).

51697118593 is a wasteful number, since it uses less digits than its factorization.

51697118593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192182866.

The product of its digits is 2041200, while the sum is 55.

The spelling of 51697118593 in words is "fifty-one billion, six hundred ninety-seven million, one hundred eighteen thousand, five hundred ninety-three".