2640308159 has 4 divisors (see below), whose sum is σ = 2640431904. Its totient is φ = 2640184416.

The previous prime is 2640308149. The next prime is 2640308183. The reversal of 2640308159 is 9518030462.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9518030462 = 2 ⋅4759015231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2640308159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640308149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20762 + ... + 75575.

It is an arithmetic number, because the mean of its divisors is an integer number (660107976).

Almost surely, 2^2640308159 is an apocalyptic number.

2640308159 is a deficient number, since it is larger than the sum of its proper divisors (123745).

2640308159 is an equidigital number, since it uses as much as digits as its factorization.

2640308159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123744.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 2640308159 is about 51383.9289953581. The cubic root of 2640308159 is about 1382.1384193927.

The spelling of 2640308159 in words is "two billion, six hundred forty million, three hundred eight thousand, one hundred fifty-nine".