51864227720 has 64 divisors (see below), whose sum is σ = 118012446720. Its totient is φ = 20511811584.

The previous prime is 51864227719. The next prime is 51864227741. The reversal of 51864227720 is 2772246815.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4351289 + ... + 4363191.

It is an arithmetic number, because the mean of its divisors is an integer number (1843944480).

Almost surely, 2^51864227720 is an apocalyptic number.

It is an amenable number.

51864227720 is an abundant number, since it is smaller than the sum of its proper divisors (66148219000).

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

51864227720 is a wasteful number, since it uses less digits than its factorization.

51864227720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13134 (or 13130 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 44.

The spelling of 51864227720 in words is "fifty-one billion, eight hundred sixty-four million, two hundred twenty-seven thousand, seven hundred twenty".