51298798727 has 4 divisors (see below), whose sum is σ = 55962325896. Its totient is φ = 46635271560.

The previous prime is 51298798669. The next prime is 51298798751. The reversal of 51298798727 is 72789789215.

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

It is a cyclic number.

It is not a de Polignac number, because 51298798727 - 2⁸ = 51298798471 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 (51298798427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2331763568 + ... + 2331763589.

It is an arithmetic number, because the mean of its divisors is an integer number (13990581474).

Almost surely, 2^51298798727 is an apocalyptic number.

51298798727 is a deficient number, since it is larger than the sum of its proper divisors (4663527169).

51298798727 is a wasteful number, since it uses less digits than its factorization.

51298798727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4663527168.

The product of its digits is 35562240, while the sum is 65.

The spelling of 51298798727 in words is "fifty-one billion, two hundred ninety-eight million, seven hundred ninety-eight thousand, seven hundred twenty-seven".