51338919475 has 6 divisors (see below), whose sum is σ = 63660260180. Its totient is φ = 41071135560.

The previous prime is 51338919451. The next prime is 51338919479. The reversal of 51338919475 is 57491983315.

It is not a de Polignac number, because 51338919475 - 2¹⁹ = 51338395187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51338919479) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1026778365 + ... + 1026778414.

Almost surely, 2^51338919475 is an apocalyptic number.

51338919475 is a deficient number, since it is larger than the sum of its proper divisors (12321340705).

51338919475 is a wasteful number, since it uses less digits than its factorization.

51338919475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053556789 (or 2053556784 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 55.

The spelling of 51338919475 in words is "fifty-one billion, three hundred thirty-eight million, nine hundred nineteen thousand, four hundred seventy-five".