2536642644 has 24 divisors (see below), whose sum is σ = 6122931360. Its totient is φ = 816390624.

The previous prime is 2536642643. The next prime is 2536642721. The reversal of 2536642644 is 4462466352.

It is a junction number, because it is equal to n+sod(n) for n = 2536642596 and 2536642605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2536642643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3644254 + ... + 3644949.

It is an arithmetic number, because the mean of its divisors is an integer number (255122140).

Almost surely, 2^2536642644 is an apocalyptic number.

It is an amenable number.

2536642644 is an abundant number, since it is smaller than the sum of its proper divisors (3586288716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2536642644 is a wasteful number, since it uses less digits than its factorization.

2536642644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7289239 (or 7289237 counting only the distinct ones).

The product of its digits is 829440, while the sum is 42.

The square root of 2536642644 is about 50365.0935073092. The cubic root of 2536642644 is about 1363.8075689640.

The spelling of 2536642644 in words is "two billion, five hundred thirty-six million, six hundred forty-two thousand, six hundred forty-four".