115515050681 has 2 divisors, whose sum is σ = 115515050682. Its totient is φ = 115515050680.

The previous prime is 115515050669. The next prime is 115515050699. The reversal of 115515050681 is 186050515511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114728528656 + 786522025 = 338716^2 + 28045^2 .

It is a cyclic number.

It is not a de Polignac number, because 115515050681 - 2⁶ = 115515050617 is a prime.

It is a super-2 number, since 2×115515050681² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (115515050281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57757525340 + 57757525341.

It is an arithmetic number, because the mean of its divisors is an integer number (57757525341).

Almost surely, 2^115515050681 is an apocalyptic number.

It is an amenable number.

115515050681 is a deficient number, since it is larger than the sum of its proper divisors (1).

115515050681 is an equidigital number, since it uses as much as digits as its factorization.

115515050681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30000, while the sum is 38.

The spelling of 115515050681 in words is "one hundred fifteen billion, five hundred fifteen million, fifty thousand, six hundred eighty-one".