115531063987 has 2 divisors, whose sum is σ = 115531063988. Its totient is φ = 115531063986.

The previous prime is 115531063981. The next prime is 115531064017. The reversal of 115531063987 is 789360135511.

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-115531063987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 115531063987.

It is not a weakly prime, because it can be changed into another prime (115531063981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57765531993 + 57765531994.

It is an arithmetic number, because the mean of its divisors is an integer number (57765531994).

Almost surely, 2^115531063987 is an apocalyptic number.

115531063987 is a deficient number, since it is larger than the sum of its proper divisors (1).

115531063987 is an equidigital number, since it uses as much as digits as its factorization.

115531063987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 49.

The spelling of 115531063987 in words is "one hundred fifteen billion, five hundred thirty-one million, sixty-three thousand, nine hundred eighty-seven".