51091159204863 has 24 divisors (see below), whose sum is σ = 75369109023936. Its totient is φ = 33335814336000.

The previous prime is 51091159204849. The next prime is 51091159204871. The reversal of 51091159204863 is 36840295119015.

51091159204863 is a `hidden beast` number, since 5 + 1 + 0 + 9 + 1 + 1 + 592 + 0 + 48 + 6 + 3 = 666.

It is a Cunningham number, because it is equal to 7147808²-1.

It is not a de Polignac number, because 51091159204863 - 2⁴ = 51091159204847 is a prime.

It is a super-2 number, since 2×51091159204863² (a number of 28 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51091119204863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63933163 + ... + 64727363.

It is an arithmetic number, because the mean of its divisors is an integer number (3140379542664).

Almost surely, 2^{51091159204863} is an apocalyptic number.

51091159204863 is a deficient number, since it is larger than the sum of its proper divisors (24277949819073).

51091159204863 is a wasteful number, since it uses less digits than its factorization.

51091159204863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946335 (or 946332 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 54.

The spelling of 51091159204863 in words is "fifty-one trillion, ninety-one billion, one hundred fifty-nine million, two hundred four thousand, eight hundred sixty-three".