51675787220 has 12 divisors (see below), whose sum is σ = 108519153204. Its totient is φ = 20670314880.

The previous prime is 51675787217. The next prime is 51675787243. The reversal of 51675787220 is 2278757615.

51675787220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 26232985156 + 25442802064 = 161966^2 + 159508^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1291894661 + ... + 1291894700.

It is an arithmetic number, because the mean of its divisors is an integer number (9043262767).

Almost surely, 2^51675787220 is an apocalyptic number.

It is an amenable number.

51675787220 is an abundant number, since it is smaller than the sum of its proper divisors (56843365984).

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

51675787220 is a wasteful number, since it uses less digits than its factorization.

51675787220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583789370 (or 2583789368 counting only the distinct ones).

The product of its (nonzero) digits is 1646400, while the sum is 50.

The spelling of 51675787220 in words is "fifty-one billion, six hundred seventy-five million, seven hundred eighty-seven thousand, two hundred twenty".