51993794097 has 48 divisors (see below), whose sum is σ = 86175498240. Its totient is φ = 29591771616.

The previous prime is 51993794033. The next prime is 51993794117. The reversal of 51993794097 is 79049739915.

51993794097 is a `hidden beast` number, since 5 + 199 + 37 + 9 + 409 + 7 = 666.

It is not a de Polignac number, because 51993794097 - 2⁶ = 51993794033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (51993799097) 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, 19523188 + ... + 19525850.

It is an arithmetic number, because the mean of its divisors is an integer number (1795322880).

Almost surely, 2^51993794097 is an apocalyptic number.

It is an amenable number.

51993794097 is a deficient number, since it is larger than the sum of its proper divisors (34181704143).

51993794097 is a wasteful number, since it uses less digits than its factorization.

51993794097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3802 (or 3799 counting only the distinct ones).

The product of its (nonzero) digits is 19289340, while the sum is 63.

The spelling of 51993794097 in words is "fifty-one billion, nine hundred ninety-three million, seven hundred ninety-four thousand, ninety-seven".