2640502165 has 8 divisors (see below), whose sum is σ = 3621260160. Its totient is φ = 1810630032.

The previous prime is 2640502153. The next prime is 2640502177. The reversal of 2640502165 is 5612050462.

It is an interprime number because it is at equal distance from previous prime (2640502153) and next prime (2640502177).

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 2640502165 - 2⁹ = 2640501653 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37721425 + ... + 37721494.

It is an arithmetic number, because the mean of its divisors is an integer number (452657520).

Almost surely, 2^2640502165 is an apocalyptic number.

It is an amenable number.

2640502165 is a deficient number, since it is larger than the sum of its proper divisors (980757995).

2640502165 is an equidigital number, since it uses as much as digits as its factorization.

2640502165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75442931.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 2640502165 is about 51385.8167688322. The cubic root of 2640502165 is about 1382.1722710699.

The spelling of 2640502165 in words is "two billion, six hundred forty million, five hundred two thousand, one hundred sixty-five".