51075409902 has 16 divisors (see below), whose sum is σ = 111437258112. Its totient is φ = 15477396920.

The previous prime is 51075409817. The next prime is 51075409919. The reversal of 51075409902 is 20990457015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386934858 + ... + 386934989.

It is an arithmetic number, because the mean of its divisors is an integer number (6964828632).

Almost surely, 2^51075409902 is an apocalyptic number.

51075409902 is an abundant number, since it is smaller than the sum of its proper divisors (60361848210).

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

51075409902 is a wasteful number, since it uses less digits than its factorization.

51075409902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773869863.

The product of its (nonzero) digits is 113400, while the sum is 42.

The spelling of 51075409902 in words is "fifty-one billion, seventy-five million, four hundred nine thousand, nine hundred two".