2638253609 has 8 divisors (see below), whose sum is σ = 2703378888. Its totient is φ = 2573165440.

The previous prime is 2638253603. The next prime is 2638253621. The reversal of 2638253609 is 9063528362.

It can be written as a sum of positive squares in 4 ways, for example, as 192654400 + 2445599209 = 13880^2 + 49453^2 .

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 2638253609 - 2⁴ = 2638253593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2638253609.

It is not an unprimeable number, because it can be changed into a prime (2638253603) 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, 183179 + ... + 197055.

It is an arithmetic number, because the mean of its divisors is an integer number (337922361).

Almost surely, 2^2638253609 is an apocalyptic number.

It is an amenable number.

2638253609 is a deficient number, since it is larger than the sum of its proper divisors (65125279).

2638253609 is a wasteful number, since it uses less digits than its factorization.

2638253609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18555.

The product of its (nonzero) digits is 466560, while the sum is 44.

The square root of 2638253609 is about 51363.9329588380. The cubic root of 2638253609 is about 1381.7798237037.

The spelling of 2638253609 in words is "two billion, six hundred thirty-eight million, two hundred fifty-three thousand, six hundred nine".