51861627368 has 16 divisors (see below), whose sum is σ = 97777794660. Its totient is φ = 25787548800.

The previous prime is 51861627361. The next prime is 51861627379. The reversal of 51861627368 is 86372616815.

It can be written as a sum of positive squares in 2 ways, for example, as 51857309284 + 4318084 = 227722^2 + 2078^2 .

It is not an unprimeable number, because it can be changed into a prime (51861627361) 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, 17906573 + ... + 17909468.

Almost surely, 2^51861627368 is an apocalyptic number.

It is an amenable number.

51861627368 is a deficient number, since it is larger than the sum of its proper divisors (45916167292).

51861627368 is a wasteful number, since it uses less digits than its factorization.

51861627368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35816228 (or 35816224 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 53.

The spelling of 51861627368 in words is "fifty-one billion, eight hundred sixty-one million, six hundred twenty-seven thousand, three hundred sixty-eight".