51315614557399 has 2 divisors, whose sum is σ = 51315614557400. Its totient is φ = 51315614557398.

The previous prime is 51315614557391. The next prime is 51315614557421. The reversal of 51315614557399 is 99375541651315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51315614557399 - 2³ = 51315614557391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51315614557399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51315614557391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25657807278699 + 25657807278700.

It is an arithmetic number, because the mean of its divisors is an integer number (25657807278700).

Almost surely, 2^{51315614557399} is an apocalyptic number.

51315614557399 is a deficient number, since it is larger than the sum of its proper divisors (1).

51315614557399 is an equidigital number, since it uses as much as digits as its factorization.

51315614557399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76545000, while the sum is 64.

The spelling of 51315614557399 in words is "fifty-one trillion, three hundred fifteen billion, six hundred fourteen million, five hundred fifty-seven thousand, three hundred ninety-nine".