51637904055 has 16 divisors (see below), whose sum is σ = 91800718560. Its totient is φ = 27540215424.

The previous prime is 51637904011. The next prime is 51637904057. The reversal of 51637904055 is 55040973615.

51637904055 is a `hidden beast` number, since 5 + 1 + 637 + 9 + 0 + 4 + 0 + 5 + 5 = 666.

It is not a de Polignac number, because 51637904055 - 2⁸ = 51637903799 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 51637904055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51637904057) 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, 191251362 + ... + 191251631.

It is an arithmetic number, because the mean of its divisors is an integer number (5737544910).

Almost surely, 2^51637904055 is an apocalyptic number.

51637904055 is a deficient number, since it is larger than the sum of its proper divisors (40162814505).

51637904055 is a wasteful number, since it uses less digits than its factorization.

51637904055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382503007 (or 382503001 counting only the distinct ones).

The product of its (nonzero) digits is 567000, while the sum is 45.

The spelling of 51637904055 in words is "fifty-one billion, six hundred thirty-seven million, nine hundred four thousand, fifty-five".