51634478218751 has 2 divisors, whose sum is σ = 51634478218752. Its totient is φ = 51634478218750.

The previous prime is 51634478218733. The next prime is 51634478218759. The reversal of 51634478218751 is 15781287443615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51634478218751 - 2¹⁴ = 51634478202367 is a prime.

It is a super-2 number, since 2×51634478218751² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51634478218759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25817239109375 + 25817239109376.

It is an arithmetic number, because the mean of its divisors is an integer number (25817239109376).

Almost surely, 2^{51634478218751} is an apocalyptic number.

51634478218751 is a deficient number, since it is larger than the sum of its proper divisors (1).

51634478218751 is an equidigital number, since it uses as much as digits as its factorization.

51634478218751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45158400, while the sum is 62.

The spelling of 51634478218751 in words is "fifty-one trillion, six hundred thirty-four billion, four hundred seventy-eight million, two hundred eighteen thousand, seven hundred fifty-one".