51389933428 has 24 divisors (see below), whose sum is σ = 93032319744. Its totient is φ = 24812822400.

The previous prime is 51389933393. The next prime is 51389933447. The reversal of 51389933428 is 82433998315.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

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, 385813 + ... + 501628.

It is an arithmetic number, because the mean of its divisors is an integer number (3876346656).

Almost surely, 2^51389933428 is an apocalyptic number.

It is an amenable number.

51389933428 is a deficient number, since it is larger than the sum of its proper divisors (41642386316).

51389933428 is a wasteful number, since it uses less digits than its factorization.

51389933428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887943 (or 887941 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 55.

The spelling of 51389933428 in words is "fifty-one billion, three hundred eighty-nine million, nine hundred thirty-three thousand, four hundred twenty-eight".