51115015759 has 2 divisors, whose sum is σ = 51115015760. Its totient is φ = 51115015758.

The previous prime is 51115015739. The next prime is 51115015799. The reversal of 51115015759 is 95751051115.

It is an a-pointer prime, because the next prime (51115015799) can be obtained adding 51115015759 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51115015759 - 2⁷ = 51115015631 is a prime.

It is a super-2 number, since 2×51115015759² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51115015709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25557507879 + 25557507880.

It is an arithmetic number, because the mean of its divisors is an integer number (25557507880).

Almost surely, 2^51115015759 is an apocalyptic number.

51115015759 is a deficient number, since it is larger than the sum of its proper divisors (1).

51115015759 is an equidigital number, since it uses as much as digits as its factorization.

51115015759 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39375, while the sum is 40.

The spelling of 51115015759 in words is "fifty-one billion, one hundred fifteen million, fifteen thousand, seven hundred fifty-nine".