51394784699 has 16 divisors (see below), whose sum is σ = 52267291200. Its totient is φ = 50529583104.

The previous prime is 51394784687. The next prime is 51394784717. The reversal of 51394784699 is 99648749315.

It is a cyclic number.

It is not a de Polignac number, because 51394784699 - 2⁸ = 51394784443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51394784629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15483362 + ... + 15486680.

It is an arithmetic number, because the mean of its divisors is an integer number (3266705700).

Almost surely, 2^51394784699 is an apocalyptic number.

51394784699 is a deficient number, since it is larger than the sum of its proper divisors (872506501).

51394784699 is a wasteful number, since it uses less digits than its factorization.

51394784699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4342.

The product of its digits is 58786560, while the sum is 65.

The spelling of 51394784699 in words is "fifty-one billion, three hundred ninety-four million, seven hundred eighty-four thousand, six hundred ninety-nine".