115605503989 has 2 divisors, whose sum is σ = 115605503990. Its totient is φ = 115605503988.

The previous prime is 115605503977. The next prime is 115605504031. The reversal of 115605503989 is 989305506511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115452487089 + 153016900 = 339783^2 + 12370^2 .

It is a cyclic number.

It is not a de Polignac number, because 115605503989 - 2⁷ = 115605503861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115605503929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57802751994 + 57802751995.

It is an arithmetic number, because the mean of its divisors is an integer number (57802751995).

Almost surely, 2^115605503989 is an apocalyptic number.

It is an amenable number.

115605503989 is a deficient number, since it is larger than the sum of its proper divisors (1).

115605503989 is an equidigital number, since it uses as much as digits as its factorization.

115605503989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458000, while the sum is 52.

The spelling of 115605503989 in words is "one hundred fifteen billion, six hundred five million, five hundred three thousand, nine hundred eighty-nine".