51393986163 has 48 divisors (see below), whose sum is σ = 82862400000. Its totient is φ = 31467582432.

The previous prime is 51393986107. The next prime is 51393986177. The reversal of 51393986163 is 36168939315.

51393986163 is a `hidden beast` number, since 5 + 1 + 393 + 98 + 6 + 163 = 666.

It is not a de Polignac number, because 51393986163 - 2⁶ = 51393986099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51393986363) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 879738 + ... + 936336.

It is an arithmetic number, because the mean of its divisors is an integer number (1726300000).

Almost surely, 2^51393986163 is an apocalyptic number.

51393986163 is a deficient number, since it is larger than the sum of its proper divisors (31468413837).

51393986163 is a wasteful number, since it uses less digits than its factorization.

51393986163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56833 (or 56814 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 54.

The spelling of 51393986163 in words is "fifty-one billion, three hundred ninety-three million, nine hundred eighty-six thousand, one hundred sixty-three".