115515423325549 has 16 divisors (see below), whose sum is σ = 124557356775600. Its totient is φ = 106495870957056.

The previous prime is 115515423325541. The next prime is 115515423325553. The reversal of 115515423325549 is 945523324515511.

It can be written as a sum of positive squares in 8 ways, for example, as 605406025 + 115514817919524 = 24605^2 + 10747782^2 .

It is a cyclic number.

It is not a de Polignac number, because 115515423325549 - 2³ = 115515423325541 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115515423325549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115515423325541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34658577 + ... + 37845049.

It is an arithmetic number, because the mean of its divisors is an integer number (7784834798475).

Almost surely, 2^{115515423325549} is an apocalyptic number.

It is an amenable number.

115515423325549 is a deficient number, since it is larger than the sum of its proper divisors (9041933450051).

115515423325549 is a wasteful number, since it uses less digits than its factorization.

115515423325549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3189984.

The product of its digits is 16200000, while the sum is 55.

The spelling of 115515423325549 in words is "one hundred fifteen trillion, five hundred fifteen billion, four hundred twenty-three million, three hundred twenty-five thousand, five hundred forty-nine".