51751486874 has 4 divisors (see below), whose sum is σ = 77627230314. Its totient is φ = 25875743436.

The previous prime is 51751486861. The next prime is 51751486889. The reversal of 51751486874 is 47868415715.

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

It can be written as a sum of positive squares in only one way, i.e., 35266210849 + 16485276025 = 187793^2 + 128395^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12937871717 + ... + 12937871720.

Almost surely, 2^51751486874 is an apocalyptic number.

51751486874 is a deficient number, since it is larger than the sum of its proper divisors (25875743440).

51751486874 is a wasteful number, since it uses less digits than its factorization.

51751486874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25875743439.

The product of its digits is 7526400, while the sum is 56.

The spelling of 51751486874 in words is "fifty-one billion, seven hundred fifty-one million, four hundred eighty-six thousand, eight hundred seventy-four".