2645281636 has 48 divisors (see below), whose sum is σ = 4798725120. Its totient is φ = 1275223040.

The previous prime is 2645281633. The next prime is 2645281643. The reversal of 2645281636 is 6361825462.

It is a junction number, because it is equal to n+sod(n) for n = 2645281592 and 2645281601.

It is not an unprimeable number, because it can be changed into a prime (2645281633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5077056 + ... + 5077576.

It is an arithmetic number, because the mean of its divisors is an integer number (99973440).

Almost surely, 2^2645281636 is an apocalyptic number.

It is an amenable number.

2645281636 is a deficient number, since it is larger than the sum of its proper divisors (2153443484).

2645281636 is a wasteful number, since it uses less digits than its factorization.

2645281636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924 (or 922 counting only the distinct ones).

The product of its digits is 414720, while the sum is 43.

The square root of 2645281636 is about 51432.3014845729. The cubic root of 2645281636 is about 1383.0057072991.

The spelling of 2645281636 in words is "two billion, six hundred forty-five million, two hundred eighty-one thousand, six hundred thirty-six".