2642445645 has 64 divisors (see below), whose sum is σ = 4941181440. Its totient is φ = 1180827648.

The previous prime is 2642445587. The next prime is 2642445661. The reversal of 2642445645 is 5465442462.

It is not a de Polignac number, because 2642445645 - 2⁶ = 2642445581 is a prime.

It is a super-3 number, since 3×2642445645³ (a number of 29 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2642445597 and 2642445606.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1874701 + ... + 1876109.

It is an arithmetic number, because the mean of its divisors is an integer number (77205960).

Almost surely, 2^2642445645 is an apocalyptic number.

It is an amenable number.

2642445645 is a deficient number, since it is larger than the sum of its proper divisors (2298735795).

2642445645 is a wasteful number, since it uses less digits than its factorization.

2642445645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1814.

The product of its digits is 921600, while the sum is 42.

The square root of 2642445645 is about 51404.7239560724. The cubic root of 2642445645 is about 1382.5112931224.

The spelling of 2642445645 in words is "two billion, six hundred forty-two million, four hundred forty-five thousand, six hundred forty-five".