8115915449 has 4 divisors (see below), whose sum is σ = 8116550736. Its totient is φ = 8115280164.

The previous prime is 8115915421. The next prime is 8115915461. The reversal of 8115915449 is 9445195118.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8115915449 - 2⁸ = 8115915193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8115915349) 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, 298079 + ... + 324164.

It is an arithmetic number, because the mean of its divisors is an integer number (2029137684).

Almost surely, 2^8115915449 is an apocalyptic number.

It is an amenable number.

8115915449 is a deficient number, since it is larger than the sum of its proper divisors (635287).

8115915449 is a wasteful number, since it uses less digits than its factorization.

8115915449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635286.

The product of its digits is 259200, while the sum is 47.

The square root of 8115915449 is about 90088.3757706842. The cubic root of 8115915449 is about 2009.6133385750.

The spelling of 8115915449 in words is "eight billion, one hundred fifteen million, nine hundred fifteen thousand, four hundred forty-nine".