51812178256 has 20 divisors (see below), whose sum is σ = 100743350004. Its totient is φ = 25813894400.

The previous prime is 51812178251. The next prime is 51812178263. The reversal of 51812178256 is 65287121815.

It can be written as a sum of positive squares in 2 ways, for example, as 22302435600 + 29509742656 = 149340^2 + 171784^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51812178251) 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, 5757535 + ... + 5766526.

Almost surely, 2^51812178256 is an apocalyptic number.

It is an amenable number.

51812178256 is a deficient number, since it is larger than the sum of its proper divisors (48931171748).

51812178256 is a wasteful number, since it uses less digits than its factorization.

51812178256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11524350 (or 11524344 counting only the distinct ones).

The product of its digits is 268800, while the sum is 46.

The spelling of 51812178256 in words is "fifty-one billion, eight hundred twelve million, one hundred seventy-eight thousand, two hundred fifty-six".