51169648799 has 4 divisors (see below), whose sum is σ = 51174050064. Its totient is φ = 51165247536.

The previous prime is 51169648793. The next prime is 51169648807. The reversal of 51169648799 is 99784696115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51169648799 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 (51169648793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2183147 + ... + 2206460.

It is an arithmetic number, because the mean of its divisors is an integer number (12793512516).

Almost surely, 2^51169648799 is an apocalyptic number.

51169648799 is a deficient number, since it is larger than the sum of its proper divisors (4401265).

51169648799 is a wasteful number, since it uses less digits than its factorization.

51169648799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4401264.

The product of its digits is 29393280, while the sum is 65.

The spelling of 51169648799 in words is "fifty-one billion, one hundred sixty-nine million, six hundred forty-eight thousand, seven hundred ninety-nine".