115605503491 has 2 divisors, whose sum is σ = 115605503492. Its totient is φ = 115605503490.

The previous prime is 115605503423. The next prime is 115605503509. The reversal of 115605503491 is 194305506511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 115605503491 - 2⁹ = 115605502979 is a prime.

It is a super-2 number, since 2×115605503491² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (115605503411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57802751745 + 57802751746.

It is an arithmetic number, because the mean of its divisors is an integer number (57802751746).

Almost surely, 2^115605503491 is an apocalyptic number.

115605503491 is a deficient number, since it is larger than the sum of its proper divisors (1).

115605503491 is an equidigital number, since it uses as much as digits as its factorization.

115605503491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 40.

The spelling of 115605503491 in words is "one hundred fifteen billion, six hundred five million, five hundred three thousand, four hundred ninety-one".