2640601609 has 8 divisors (see below), whose sum is σ = 2697808680. Its totient is φ = 2584006656.

The previous prime is 2640601567. The next prime is 2640601637. The reversal of 2640601609 is 9061060462.

It can be written as a sum of positive squares in 4 ways, for example, as 791859600 + 1848742009 = 28140^2 + 42997^2 .

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 2640601609 - 2¹⁷ = 2640470537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2640607609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144304 + ... + 161569.

It is an arithmetic number, because the mean of its divisors is an integer number (337226085).

Almost surely, 2^2640601609 is an apocalyptic number.

It is an amenable number.

2640601609 is a deficient number, since it is larger than the sum of its proper divisors (57207071).

2640601609 is an equidigital number, since it uses as much as digits as its factorization.

2640601609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306059.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 2640601609 is about 51386.7843808114. The cubic root of 2640601609 is about 1382.1896221904.

The spelling of 2640601609 in words is "two billion, six hundred forty million, six hundred one thousand, six hundred nine".