51196639485 has 16 divisors (see below), whose sum is σ = 81922628736. Its totient is φ = 27302205888.

The previous prime is 51196639453. The next prime is 51196639547. The reversal of 51196639485 is 58493669115.

It is not a de Polignac number, because 51196639485 - 2⁵ = 51196639453 is a prime.

It is a super-2 number, since 2×51196639485² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2994 + ... + 320003.

It is an arithmetic number, because the mean of its divisors is an integer number (5120164296).

Almost surely, 2^51196639485 is an apocalyptic number.

It is an amenable number.

51196639485 is a deficient number, since it is larger than the sum of its proper divisors (30725989251).

51196639485 is a wasteful number, since it uses less digits than its factorization.

51196639485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333572.

The product of its digits is 6998400, while the sum is 57.

The spelling of 51196639485 in words is "fifty-one billion, one hundred ninety-six million, six hundred thirty-nine thousand, four hundred eighty-five".