2643590889 has 6 divisors (see below), whose sum is σ = 3818520186. Its totient is φ = 1762393920.

The previous prime is 2643590881. The next prime is 2643590909. The reversal of 2643590889 is 9880953462.

2643590889 is a `hidden beast` number, since 2 + 6 + 43 + 590 + 8 + 8 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2145542400 + 498048489 = 46320^2 + 22317^2 .

It is not a de Polignac number, because 2643590889 - 2³ = 2643590881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2643590881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 146866152 + ... + 146866169.

It is an arithmetic number, because the mean of its divisors is an integer number (636420031).

Almost surely, 2^2643590889 is an apocalyptic number.

It is an amenable number.

2643590889 is a deficient number, since it is larger than the sum of its proper divisors (1174929297).

2643590889 is a wasteful number, since it uses less digits than its factorization.

2643590889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293732327 (or 293732324 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The square root of 2643590889 is about 51415.8622314165. The cubic root of 2643590889 is about 1382.7109924784.

The spelling of 2643590889 in words is "two billion, six hundred forty-three million, five hundred ninety thousand, eight hundred eighty-nine".