51399112478759 has 2 divisors, whose sum is σ = 51399112478760. Its totient is φ = 51399112478758.

The previous prime is 51399112478737. The next prime is 51399112478801. The reversal of 51399112478759 is 95787421199315.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51399112478759 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51399112478692 and 51399112478701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51399112478159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25699556239379 + 25699556239380.

It is an arithmetic number, because the mean of its divisors is an integer number (25699556239380).

Almost surely, 2^{51399112478759} is an apocalyptic number.

51399112478759 is a deficient number, since it is larger than the sum of its proper divisors (1).

51399112478759 is an equidigital number, since it uses as much as digits as its factorization.

51399112478759 is an evil number, because the sum of its binary digits is even.

The product of its digits is 171460800, while the sum is 71.

The spelling of 51399112478759 in words is "fifty-one trillion, three hundred ninety-nine billion, one hundred twelve million, four hundred seventy-eight thousand, seven hundred fifty-nine".