2642756645 has 16 divisors (see below), whose sum is σ = 3340560000. Its totient is φ = 2001526848.

The previous prime is 2642756621. The next prime is 2642756647. The reversal of 2642756645 is 5466572462.

It is a cyclic number.

It is not a de Polignac number, because 2642756645 - 2⁶ = 2642756581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2642756645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2642756647) 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 15 ways as a sum of consecutive naturals, for example, 138176 + ... + 156134.

It is an arithmetic number, because the mean of its divisors is an integer number (208785000).

Almost surely, 2^2642756645 is an apocalyptic number.

It is an amenable number.

2642756645 is a deficient number, since it is larger than the sum of its proper divisors (697803355).

2642756645 is a wasteful number, since it uses less digits than its factorization.

2642756645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19532.

The product of its digits is 2419200, while the sum is 47.

The square root of 2642756645 is about 51407.7488808837. The cubic root of 2642756645 is about 1382.5655287565.

The spelling of 2642756645 in words is "two billion, six hundred forty-two million, seven hundred fifty-six thousand, six hundred forty-five".