2640330365 has 8 divisors (see below), whose sum is σ = 3176300088. Its totient is φ = 2106995200.

The previous prime is 2640330353. The next prime is 2640330373. The reversal of 2640330365 is 5630330462.

It can be written as a sum of positive squares in 4 ways, for example, as 828806521 + 1811523844 = 28789^2 + 42562^2 .

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

It is not a de Polignac number, because 2640330365 - 2²⁶ = 2573221501 is a prime.

It is a Duffinian number.

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, 656432 + ... + 660441.

It is an arithmetic number, because the mean of its divisors is an integer number (397037511).

Almost surely, 2^2640330365 is an apocalyptic number.

It is an amenable number.

2640330365 is a deficient number, since it is larger than the sum of its proper divisors (535969723).

2640330365 is a wasteful number, since it uses less digits than its factorization.

2640330365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317279.

The product of its (nonzero) digits is 38880, while the sum is 32.

The square root of 2640330365 is about 51384.1450741374. The cubic root of 2640330365 is about 1382.1422941524.

The spelling of 2640330365 in words is "two billion, six hundred forty million, three hundred thirty thousand, three hundred sixty-five".