51722968499 has 4 divisors (see below), whose sum is σ = 52235077200. Its totient is φ = 51210859800.

The previous prime is 51722968487. The next prime is 51722968511. The reversal of 51722968499 is 99486922715.

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

It is an interprime number because it is at equal distance from previous prime (51722968487) and next prime (51722968511).

It is a cyclic number.

It is not a de Polignac number, because 51722968499 - 2⁴ = 51722968483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51722968699) 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, 256054199 + ... + 256054400.

It is an arithmetic number, because the mean of its divisors is an integer number (13058769300).

Almost surely, 2^51722968499 is an apocalyptic number.

51722968499 is a deficient number, since it is larger than the sum of its proper divisors (512108701).

51722968499 is a wasteful number, since it uses less digits than its factorization.

51722968499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512108700.

The product of its digits is 19595520, while the sum is 62.

The spelling of 51722968499 in words is "fifty-one billion, seven hundred twenty-two million, nine hundred sixty-eight thousand, four hundred ninety-nine".