51263975499 has 24 divisors (see below), whose sum is σ = 77554262016. Its totient is φ = 30066841200.

The previous prime is 51263975479. The next prime is 51263975527. The reversal of 51263975499 is 99457936215.

It is not a de Polignac number, because 51263975499 - 2⁹ = 51263974987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51263975459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2266539 + ... + 2289044.

It is an arithmetic number, because the mean of its divisors is an integer number (3231427584).

Almost surely, 2^51263975499 is an apocalyptic number.

51263975499 is a deficient number, since it is larger than the sum of its proper divisors (26290286517).

51263975499 is a wasteful number, since it uses less digits than its factorization.

51263975499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4555639 (or 4555628 counting only the distinct ones).

The product of its digits is 18370800, while the sum is 60.

The spelling of 51263975499 in words is "fifty-one billion, two hundred sixty-three million, nine hundred seventy-five thousand, four hundred ninety-nine".