2638540859 has 8 divisors (see below), whose sum is σ = 2648806032. Its totient is φ = 2628288000.

The previous prime is 2638540769. The next prime is 2638540871. The reversal of 2638540859 is 9580458362.

2638540859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2638540859 - 2²⁰ = 2637492283 is a prime.

It is a super-2 number, since 2×2638540859² = 13923795729224915762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2638540159) 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, 809984 + ... + 813234.

It is an arithmetic number, because the mean of its divisors is an integer number (331100754).

Almost surely, 2^2638540859 is an apocalyptic number.

2638540859 is a deficient number, since it is larger than the sum of its proper divisors (10265173).

2638540859 is a wasteful number, since it uses less digits than its factorization.

2638540859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6157.

The product of its (nonzero) digits is 2073600, while the sum is 50.

The square root of 2638540859 is about 51366.7291055212. The cubic root of 2638540859 is about 1381.8299707465.

The spelling of 2638540859 in words is "two billion, six hundred thirty-eight million, five hundred forty thousand, eight hundred fifty-nine".