51777749790 has 48 divisors (see below), whose sum is σ = 144977702688. Its totient is φ = 12745291968.

The previous prime is 51777749747. The next prime is 51777749801. The reversal of 51777749790 is 9794777715.

51777749790 is a `hidden beast` number, since 5 + 1 + 77 + 77 + 497 + 9 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22126074 + ... + 22128413.

It is an arithmetic number, because the mean of its divisors is an integer number (3020368806).

Almost surely, 2^51777749790 is an apocalyptic number.

51777749790 is an abundant number, since it is smaller than the sum of its proper divisors (93199952898).

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

51777749790 is a wasteful number, since it uses less digits than its factorization.

51777749790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44254513 (or 44254510 counting only the distinct ones).

The product of its (nonzero) digits is 27227340, while the sum is 63.

The spelling of 51777749790 in words is "fifty-one billion, seven hundred seventy-seven million, seven hundred forty-nine thousand, seven hundred ninety".