2645822775 has 24 divisors (see below), whose sum is σ = 4406374224. Its totient is φ = 1400800000.

The previous prime is 2645822771. The next prime is 2645822797. The reversal of 2645822775 is 5772285462.

It is not a de Polignac number, because 2645822775 - 2² = 2645822771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645822771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118476 + ... + 139025.

It is an arithmetic number, because the mean of its divisors is an integer number (183598926).

Almost surely, 2^2645822775 is an apocalyptic number.

2645822775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2645822775 is a deficient number, since it is larger than the sum of its proper divisors (1760551449).

2645822775 is a wasteful number, since it uses less digits than its factorization.

2645822775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257651 (or 257646 counting only the distinct ones).

The product of its digits is 1881600, while the sum is 48.

The square root of 2645822775 is about 51437.5619076177. The cubic root of 2645822775 is about 1383.1000069367.

The spelling of 2645822775 in words is "two billion, six hundred forty-five million, eight hundred twenty-two thousand, seven hundred seventy-five".