2318649509 has 8 divisors (see below), whose sum is σ = 2529906528. Its totient is φ = 2107470960.

The previous prime is 2318649497. The next prime is 2318649523. The reversal of 2318649509 is 9059468132.

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 2318649509 - 2²⁰ = 2317600933 is a prime.

It is a super-2 number, since 2×2318649509² = 10752271091171882162, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2318649539) 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, 54299 + ... + 87095.

It is an arithmetic number, because the mean of its divisors is an integer number (316238316).

Almost surely, 2^2318649509 is an apocalyptic number.

It is an amenable number.

2318649509 is a deficient number, since it is larger than the sum of its proper divisors (211257019).

2318649509 is a wasteful number, since it uses less digits than its factorization.

2318649509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39235.

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 2318649509 is about 48152.3572527867. The cubic root of 2318649509 is about 1323.5642706952.

The spelling of 2318649509 in words is "two billion, three hundred eighteen million, six hundred forty-nine thousand, five hundred nine".