51119855863 has 2 divisors, whose sum is σ = 51119855864. Its totient is φ = 51119855862.

The previous prime is 51119855783. The next prime is 51119855893. The reversal of 51119855863 is 36855891115.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51119855863 is a prime.

It is a super-2 number, since 2×51119855863² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51119855863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51119855893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25559927931 + 25559927932.

It is an arithmetic number, because the mean of its divisors is an integer number (25559927932).

Almost surely, 2^51119855863 is an apocalyptic number.

51119855863 is a deficient number, since it is larger than the sum of its proper divisors (1).

51119855863 is an equidigital number, since it uses as much as digits as its factorization.

51119855863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296000, while the sum is 52.

The spelling of 51119855863 in words is "fifty-one billion, one hundred nineteen million, eight hundred fifty-five thousand, eight hundred sixty-three".