2640654319 has 8 divisors (see below), whose sum is σ = 2796843168. Its totient is φ = 2484560640.

The previous prime is 2640654299. The next prime is 2640654329. The reversal of 2640654319 is 9134560462.

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 2640654319 - 2⁵ = 2640654287 is a prime.

It is a super-2 number, since 2×2640654319² = 13946110464906707522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640654329) 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, 37939 + ... + 81979.

It is an arithmetic number, because the mean of its divisors is an integer number (349605396).

Almost surely, 2^2640654319 is an apocalyptic number.

2640654319 is a deficient number, since it is larger than the sum of its proper divisors (156188849).

2640654319 is a wasteful number, since it uses less digits than its factorization.

2640654319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47585.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 2640654319 is about 51387.2972533096. The cubic root of 2640654319 is about 1382.1988189242.

The spelling of 2640654319 in words is "two billion, six hundred forty million, six hundred fifty-four thousand, three hundred nineteen".