51298840184639 has 2 divisors, whose sum is σ = 51298840184640. Its totient is φ = 51298840184638.

The previous prime is 51298840184633. The next prime is 51298840184701. The reversal of 51298840184639 is 93648104889215.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51298840184639 is a prime.

It is a super-2 number, since 2×51298840184639² (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 (51298840184633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25649420092319 + 25649420092320.

It is an arithmetic number, because the mean of its divisors is an integer number (25649420092320).

Almost surely, 2^{51298840184639} is an apocalyptic number.

51298840184639 is a deficient number, since it is larger than the sum of its proper divisors (1).

51298840184639 is an equidigital number, since it uses as much as digits as its factorization.

51298840184639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 119439360, while the sum is 68.

The spelling of 51298840184639 in words is "fifty-one trillion, two hundred ninety-eight billion, eight hundred forty million, one hundred eighty-four thousand, six hundred thirty-nine".