51555785264 has 20 divisors (see below), whose sum is σ = 99908002800. Its totient is φ = 25773074880.

The previous prime is 51555785251. The next prime is 51555785269. The reversal of 51555785264 is 46258755515.

It is not an unprimeable number, because it can be changed into a prime (51555785269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212027 + ... + 384794.

It is an arithmetic number, because the mean of its divisors is an integer number (4995400140).

Almost surely, 2^51555785264 is an apocalyptic number.

It is an amenable number.

51555785264 is a deficient number, since it is larger than the sum of its proper divisors (48352217536).

51555785264 is a wasteful number, since it uses less digits than its factorization.

51555785264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602228 (or 602222 counting only the distinct ones).

The product of its digits is 8400000, while the sum is 53.

The spelling of 51555785264 in words is "fifty-one billion, five hundred fifty-five million, seven hundred eighty-five thousand, two hundred sixty-four".