51704278791 has 16 divisors (see below), whose sum is σ = 77632232448. Its totient is φ = 30325089600.

The previous prime is 51704278777. The next prime is 51704278793. The reversal of 51704278791 is 19787240715.

It is not a de Polignac number, because 51704278791 - 2⁷ = 51704278663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51704278793) 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, 25269886 + ... + 25271931.

It is an arithmetic number, because the mean of its divisors is an integer number (4852014528).

Almost surely, 2^51704278791 is an apocalyptic number.

51704278791 is a deficient number, since it is larger than the sum of its proper divisors (25927953657).

51704278791 is a wasteful number, since it uses less digits than its factorization.

51704278791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50541862.

The product of its (nonzero) digits is 987840, while the sum is 51.

The spelling of 51704278791 in words is "fifty-one billion, seven hundred four million, two hundred seventy-eight thousand, seven hundred ninety-one".