115766557 has 2 divisors, whose sum is σ = 115766558. Its totient is φ = 115766556.

The previous prime is 115766543. The next prime is 115766561. The reversal of 115766557 is 755667511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84529636 + 31236921 = 9194^2 + 5589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115766557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115766537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57883278 + 57883279.

It is an arithmetic number, because the mean of its divisors is an integer number (57883279).

Almost surely, 2^115766557 is an apocalyptic number.

It is an amenable number.

115766557 is a deficient number, since it is larger than the sum of its proper divisors (1).

115766557 is an equidigital number, since it uses as much as digits as its factorization.

115766557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 220500, while the sum is 43.

The square root of 115766557 is about 10759.4868372056. The cubic root of 115766557 is about 487.3725208645.

The spelling of 115766557 in words is "one hundred fifteen million, seven hundred sixty-six thousand, five hundred fifty-seven".