2645984187 has 48 divisors (see below), whose sum is σ = 4780968192. Its totient is φ = 1369949760.

The previous prime is 2645984179. The next prime is 2645984189. The reversal of 2645984187 is 7814895462.

It is a happy number.

2645984187 is a `hidden beast` number, since 2 + 6 + 4 + 598 + 41 + 8 + 7 = 666.

It is not a de Polignac number, because 2645984187 - 2³ = 2645984179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2645984189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 206533 + ... + 218969.

It is an arithmetic number, because the mean of its divisors is an integer number (99603504).

Almost surely, 2^2645984187 is an apocalyptic number.

2645984187 is a deficient number, since it is larger than the sum of its proper divisors (2134984005).

2645984187 is a wasteful number, since it uses less digits than its factorization.

2645984187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12768 (or 12765 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The square root of 2645984187 is about 51439.1308927357. The cubic root of 2645984187 is about 1383.1281323275.

The spelling of 2645984187 in words is "two billion, six hundred forty-five million, nine hundred eighty-four thousand, one hundred eighty-seven".