115309580921 has 8 divisors (see below), whose sum is σ = 115690166280. Its totient is φ = 114929073792.

The previous prime is 115309580849. The next prime is 115309580977. The reversal of 115309580921 is 129085903511.

It can be written as a sum of positive squares in 4 ways, for example, as 22848400 + 115286732521 = 4780^2 + 339539^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115309580921 - 2¹⁸ = 115309318777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115309540921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5176235 + ... + 5198463.

It is an arithmetic number, because the mean of its divisors is an integer number (14461270785).

Almost surely, 2^115309580921 is an apocalyptic number.

It is an amenable number.

115309580921 is a deficient number, since it is larger than the sum of its proper divisors (380585359).

115309580921 is a wasteful number, since it uses less digits than its factorization.

115309580921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39115.

The product of its (nonzero) digits is 97200, while the sum is 44.

The spelling of 115309580921 in words is "one hundred fifteen billion, three hundred nine million, five hundred eighty thousand, nine hundred twenty-one".