51938420886 has 64 divisors (see below), whose sum is σ = 127209519360. Its totient is φ = 15576641280.

The previous prime is 51938420869. The next prime is 51938420929. The reversal of 51938420886 is 68802483915.

51938420886 is a `hidden beast` number, since 51 + 9 + 384 + 208 + 8 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 393096 + ... + 508331.

It is an arithmetic number, because the mean of its divisors is an integer number (1987648740).

Almost surely, 2^51938420886 is an apocalyptic number.

51938420886 is an abundant number, since it is smaller than the sum of its proper divisors (75271098474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51938420886 is a wasteful number, since it uses less digits than its factorization.

51938420886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901546 (or 901540 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 51938420886 in words is "fifty-one billion, nine hundred thirty-eight million, four hundred twenty thousand, eight hundred eighty-six".