517239764953 has 4 divisors (see below), whose sum is σ = 517251335040. Its totient is φ = 517228194868.

The previous prime is 517239764929. The next prime is 517239764981. The reversal of 517239764953 is 359467932715.

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 517239764953 - 2²¹ = 517237667801 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 517239764891 and 517239764900.

It is not an unprimeable number, because it can be changed into a prime (517239764053) 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, 5717725 + ... + 5807482.

It is an arithmetic number, because the mean of its divisors is an integer number (129312833760).

Almost surely, 2^517239764953 is an apocalyptic number.

It is an amenable number.

517239764953 is a deficient number, since it is larger than the sum of its proper divisors (11570087).

517239764953 is a wasteful number, since it uses less digits than its factorization.

517239764953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11570086.

The product of its digits is 42865200, while the sum is 61.

The spelling of 517239764953 in words is "five hundred seventeen billion, two hundred thirty-nine million, seven hundred sixty-four thousand, nine hundred fifty-three".