51900372169 has 4 divisors (see below), whose sum is σ = 51902172160. Its totient is φ = 51898572180.

The previous prime is 51900372163. The next prime is 51900372179. The reversal of 51900372169 is 96127300915.

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 51900372169 - 2³⁵ = 17540633801 is a prime.

It is a super-2 number, since 2×51900372169² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51900372163) 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, 856029 + ... + 914650.

It is an arithmetic number, because the mean of its divisors is an integer number (12975543040).

Almost surely, 2^51900372169 is an apocalyptic number.

It is an amenable number.

51900372169 is a deficient number, since it is larger than the sum of its proper divisors (1799991).

51900372169 is a wasteful number, since it uses less digits than its factorization.

51900372169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799990.

The product of its (nonzero) digits is 102060, while the sum is 43.

The spelling of 51900372169 in words is "fifty-one billion, nine hundred million, three hundred seventy-two thousand, one hundred sixty-nine".