51495294724 has 6 divisors (see below), whose sum is σ = 90116765774. Its totient is φ = 25747647360.

The previous prime is 51495294701. The next prime is 51495294731. The reversal of 51495294724 is 42749259415.

It can be written as a sum of positive squares in only one way, i.e., 29992005124 + 21503289600 = 173182^2 + 146640^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6436911837 + ... + 6436911844.

Almost surely, 2^51495294724 is an apocalyptic number.

It is an amenable number.

51495294724 is a deficient number, since it is larger than the sum of its proper divisors (38621471050).

51495294724 is a wasteful number, since it uses less digits than its factorization.

51495294724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12873823685 (or 12873823683 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 52.

The spelling of 51495294724 in words is "fifty-one billion, four hundred ninety-five million, two hundred ninety-four thousand, seven hundred twenty-four".