2639275405 has 16 divisors (see below), whose sum is σ = 3412450944. Its totient is φ = 1948034880.

The previous prime is 2639275393. The next prime is 2639275421. The reversal of 2639275405 is 5045729362.

It is not a de Polignac number, because 2639275405 - 2⁹ = 2639274893 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 15 ways as a sum of consecutive naturals, for example, 138400 + ... + 156310.

It is an arithmetic number, because the mean of its divisors is an integer number (213278184).

Almost surely, 2^2639275405 is an apocalyptic number.

It is an amenable number.

2639275405 is a deficient number, since it is larger than the sum of its proper divisors (773175539).

2639275405 is a wasteful number, since it uses less digits than its factorization.

2639275405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20196.

The product of its (nonzero) digits is 453600, while the sum is 43.

The square root of 2639275405 is about 51373.8786252313. The cubic root of 2639275405 is about 1381.9581885199.

The spelling of 2639275405 in words is "two billion, six hundred thirty-nine million, two hundred seventy-five thousand, four hundred five".