51307166399 has 2 divisors, whose sum is σ = 51307166400. Its totient is φ = 51307166398.

The previous prime is 51307166389. The next prime is 51307166467. The reversal of 51307166399 is 99366170315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51307166399 - 2⁸ = 51307166143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51307166359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25653583199 + 25653583200.

It is an arithmetic number, because the mean of its divisors is an integer number (25653583200).

Almost surely, 2^51307166399 is an apocalyptic number.

51307166399 is a deficient number, since it is larger than the sum of its proper divisors (1).

51307166399 is an equidigital number, since it uses as much as digits as its factorization.

51307166399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 918540, while the sum is 50.

The spelling of 51307166399 in words is "fifty-one billion, three hundred seven million, one hundred sixty-six thousand, three hundred ninety-nine".