2645639455 has 4 divisors (see below), whose sum is σ = 3174767352. Its totient is φ = 2116511560.

The previous prime is 2645639413. The next prime is 2645639459. The reversal of 2645639455 is 5549365462.

2645639455 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 is not a de Polignac number, because 2645639455 - 2⁷ = 2645639327 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2645639399 and 2645639408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645639459) 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, 264563941 + ... + 264563950.

It is an arithmetic number, because the mean of its divisors is an integer number (793691838).

Almost surely, 2^2645639455 is an apocalyptic number.

2645639455 is a deficient number, since it is larger than the sum of its proper divisors (529127897).

2645639455 is an equidigital number, since it uses as much as digits as its factorization.

2645639455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529127896.

The product of its digits is 3888000, while the sum is 49.

The square root of 2645639455 is about 51435.7799104864. The cubic root of 2645639455 is about 1383.0680627778.

The spelling of 2645639455 in words is "two billion, six hundred forty-five million, six hundred thirty-nine thousand, four hundred fifty-five".