51801686263 has 8 divisors (see below), whose sum is σ = 52399282320. Its totient is φ = 51206191680.

The previous prime is 51801686257. The next prime is 51801686329. The reversal of 51801686263 is 36268610815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51801686263 - 2¹⁷ = 51801555191 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 (51801680263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475758 + ... + 574411.

It is an arithmetic number, because the mean of its divisors is an integer number (6549910290).

Almost surely, 2^51801686263 is an apocalyptic number.

51801686263 is a deficient number, since it is larger than the sum of its proper divisors (597596057).

51801686263 is a wasteful number, since it uses less digits than its factorization.

51801686263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050737.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 51801686263 in words is "fifty-one billion, eight hundred one million, six hundred eighty-six thousand, two hundred sixty-three".