51405035838 has 32 divisors (see below), whose sum is σ = 116545833600. Its totient is φ = 14984463456.

The previous prime is 51405035827. The next prime is 51405035873. The reversal of 51405035838 is 83853050415.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51405035838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17341648 + ... + 17344611.

It is an arithmetic number, because the mean of its divisors is an integer number (3642057300).

Almost surely, 2^51405035838 is an apocalyptic number.

51405035838 is an abundant number, since it is smaller than the sum of its proper divisors (65140797762).

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

51405035838 is a wasteful number, since it uses less digits than its factorization.

51405035838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34686296.

The product of its (nonzero) digits is 288000, while the sum is 42.

The spelling of 51405035838 in words is "fifty-one billion, four hundred five million, thirty-five thousand, eight hundred thirty-eight".