51020555394 has 32 divisors (see below), whose sum is σ = 103166743680. Its totient is φ = 16819679232.

The previous prime is 51020555359. The next prime is 51020555401. The reversal of 51020555394 is 49355502015.

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 15 ways as a sum of consecutive naturals, for example, 421564 + ... + 528920.

It is an arithmetic number, because the mean of its divisors is an integer number (3223960740).

Almost surely, 2^51020555394 is an apocalyptic number.

51020555394 is an abundant number, since it is smaller than the sum of its proper divisors (52146188286).

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

51020555394 is a wasteful number, since it uses less digits than its factorization.

51020555394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108234.

The product of its (nonzero) digits is 135000, while the sum is 39.

The spelling of 51020555394 in words is "fifty-one billion, twenty million, five hundred fifty-five thousand, three hundred ninety-four".