2638783405 has 4 divisors (see below), whose sum is σ = 3166540092. Its totient is φ = 2111026720.

The previous prime is 2638783397. The next prime is 2638783417. The reversal of 2638783405 is 5043878362.

2638783405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1285867881 + 1352915524 = 35859^2 + 36782^2 .

It is not a de Polignac number, because 2638783405 - 2³ = 2638783397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263878336 + ... + 263878345.

It is an arithmetic number, because the mean of its divisors is an integer number (791635023).

Almost surely, 2^2638783405 is an apocalyptic number.

It is an amenable number.

2638783405 is a deficient number, since it is larger than the sum of its proper divisors (527756687).

2638783405 is an equidigital number, since it uses as much as digits as its factorization.

2638783405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527756686.

The product of its (nonzero) digits is 967680, while the sum is 46.

The square root of 2638783405 is about 51369.0899763661. The cubic root of 2638783405 is about 1381.8723106964.

The spelling of 2638783405 in words is "two billion, six hundred thirty-eight million, seven hundred eighty-three thousand, four hundred five".