51199948799 has 16 divisors (see below), whose sum is σ = 53110681344. Its totient is φ = 49321425600.

The previous prime is 51199948771. The next prime is 51199948853. The reversal of 51199948799 is 99784999115.

It is not a de Polignac number, because 51199948799 - 2²⁰ = 51198900223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51199948759) 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, 8514704 + ... + 8520714.

It is an arithmetic number, because the mean of its divisors is an integer number (3319417584).

Almost surely, 2^51199948799 is an apocalyptic number.

51199948799 is a deficient number, since it is larger than the sum of its proper divisors (1910732545).

51199948799 is a wasteful number, since it uses less digits than its factorization.

51199948799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8638.

The product of its digits is 66134880, while the sum is 71.

The spelling of 51199948799 in words is "fifty-one billion, one hundred ninety-nine million, nine hundred forty-eight thousand, seven hundred ninety-nine".