8640109965 has 16 divisors (see below), whose sum is σ = 14425227648. Its totient is φ = 4407708096.

The previous prime is 8640109957. The next prime is 8640109981. The reversal of 8640109965 is 5699010468.

It is not a de Polignac number, because 8640109965 - 2³ = 8640109957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12521554 + ... + 12522243.

It is an arithmetic number, because the mean of its divisors is an integer number (901576728).

Almost surely, 2^8640109965 is an apocalyptic number.

It is an amenable number.

8640109965 is a deficient number, since it is larger than the sum of its proper divisors (5785117683).

8640109965 is a wasteful number, since it uses less digits than its factorization.

8640109965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25043828.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 8640109965 is about 92952.1918246149. The cubic root of 8640109965 is about 2051.9798414151.

The spelling of 8640109965 in words is "eight billion, six hundred forty million, one hundred nine thousand, nine hundred sixty-five".