115985049553 has 4 divisors (see below), whose sum is σ = 119119780660. Its totient is φ = 112850318448.

The previous prime is 115985049511. The next prime is 115985049569. The reversal of 115985049553 is 355940589511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355940589511 = 13 ⋅27380045347.

It can be written as a sum of positive squares in 2 ways, for example, as 101281789504 + 14703260049 = 318248^2 + 121257^2 .

It is a cyclic number.

It is not a de Polignac number, because 115985049553 - 2²⁹ = 115448178641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115985049494 and 115985049503.

It is not an unprimeable number, because it can be changed into a prime (115985049503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1567365498 + ... + 1567365571.

It is an arithmetic number, because the mean of its divisors is an integer number (29779945165).

Almost surely, 2^115985049553 is an apocalyptic number.

It is an amenable number.

115985049553 is a deficient number, since it is larger than the sum of its proper divisors (3134731107).

115985049553 is an equidigital number, since it uses as much as digits as its factorization.

115985049553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3134731106.

The product of its (nonzero) digits is 4860000, while the sum is 55.

The spelling of 115985049553 in words is "one hundred fifteen billion, nine hundred eighty-five million, forty-nine thousand, five hundred fifty-three".