51975295189 has 4 divisors (see below), whose sum is σ = 54235090656. Its totient is φ = 49715499724.

The previous prime is 51975295171. The next prime is 51975295231. The reversal of 51975295189 is 98159257915.

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 51975295189 - 2⁵ = 51975295157 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 (51975295129) 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, 1129897699 + ... + 1129897744.

It is an arithmetic number, because the mean of its divisors is an integer number (13558772664).

Almost surely, 2^51975295189 is an apocalyptic number.

It is an amenable number.

51975295189 is a deficient number, since it is larger than the sum of its proper divisors (2259795467).

51975295189 is a wasteful number, since it uses less digits than its factorization.

51975295189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2259795466.

The product of its digits is 10206000, while the sum is 61.

The spelling of 51975295189 in words is "fifty-one billion, nine hundred seventy-five million, two hundred ninety-five thousand, one hundred eighty-nine".