51920705859 has 32 divisors (see below), whose sum is σ = 77132563200. Its totient is φ = 30802584960.

The previous prime is 51920705821. The next prime is 51920705867. The reversal of 51920705859 is 95850702915.

It is not a de Polignac number, because 51920705859 - 2¹⁹ = 51920181571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51920705899) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 211597 + ... + 385505.

It is an arithmetic number, because the mean of its divisors is an integer number (2410392600).

Almost surely, 2^51920705859 is an apocalyptic number.

51920705859 is a deficient number, since it is larger than the sum of its proper divisors (25211857341).

51920705859 is a wasteful number, since it uses less digits than its factorization.

51920705859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174115.

The product of its (nonzero) digits is 1134000, while the sum is 51.

The spelling of 51920705859 in words is "fifty-one billion, nine hundred twenty million, seven hundred five thousand, eight hundred fifty-nine".