51800564159 has 4 divisors (see below), whose sum is σ = 51804614760. Its totient is φ = 51796513560.

The previous prime is 51800564129. The next prime is 51800564203. The reversal of 51800564159 is 95146500815.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51800564159 - 2³² = 47505596863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51800564129) 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, 2006057 + ... + 2031714.

It is an arithmetic number, because the mean of its divisors is an integer number (12951153690).

Almost surely, 2^51800564159 is an apocalyptic number.

51800564159 is a deficient number, since it is larger than the sum of its proper divisors (4050601).

51800564159 is a wasteful number, since it uses less digits than its factorization.

51800564159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4050600.

The product of its (nonzero) digits is 216000, while the sum is 44.

The spelling of 51800564159 in words is "fifty-one billion, eight hundred million, five hundred sixty-four thousand, one hundred fifty-nine".