2640226646 has 8 divisors (see below), whose sum is σ = 3977634720. Its totient is φ = 1314348408.

The previous prime is 2640226637. The next prime is 2640226663. The reversal of 2640226646 is 6466220462.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2881886 + ... + 2882801.

It is an arithmetic number, because the mean of its divisors is an integer number (497204340).

Almost surely, 2^2640226646 is an apocalyptic number.

2640226646 is a deficient number, since it is larger than the sum of its proper divisors (1337408074).

2640226646 is a wasteful number, since it uses less digits than its factorization.

2640226646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5764918.

The product of its (nonzero) digits is 165888, while the sum is 38.

The square root of 2640226646 is about 51383.1358132218. The cubic root of 2640226646 is about 1382.1241958751.

The spelling of 2640226646 in words is "two billion, six hundred forty million, two hundred twenty-six thousand, six hundred forty-six".