2643356885 has 12 divisors (see below), whose sum is σ = 3434800932. Its totient is φ = 1952016768.

The previous prime is 2643356851. The next prime is 2643356917. The reversal of 2643356885 is 5886533462.

It can be written as a sum of positive squares in 6 ways, for example, as 997675396 + 1645681489 = 31586^2 + 40567^2 .

It is not a de Polignac number, because 2643356885 - 2¹⁰ = 2643355861 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 11 ways as a sum of consecutive naturals, for example, 1563272 + ... + 1564961.

It is an arithmetic number, because the mean of its divisors is an integer number (286233411).

Almost surely, 2^2643356885 is an apocalyptic number.

It is an amenable number.

2643356885 is a deficient number, since it is larger than the sum of its proper divisors (791444047).

2643356885 is a wasteful number, since it uses less digits than its factorization.

2643356885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3128264 (or 3128251 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 50.

The square root of 2643356885 is about 51413.5865798137. The cubic root of 2643356885 is about 1382.6701932443.

The spelling of 2643356885 in words is "two billion, six hundred forty-three million, three hundred fifty-six thousand, eight hundred eighty-five".