2640545565554 has 16 divisors (see below), whose sum is σ = 4281236534400. Its totient is φ = 1214216237520.

The previous prime is 2640545565517. The next prime is 2640545565571. The reversal of 2640545565554 is 4555655450462.

It is a super-2 number, since 2×2640545565554² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2640545565554.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187372004 + ... + 187386095.

It is an arithmetic number, because the mean of its divisors is an integer number (267577283400).

Almost surely, 2^{2640545565554} is an apocalyptic number.

2640545565554 is a deficient number, since it is larger than the sum of its proper divisors (1640690968846).

2640545565554 is a wasteful number, since it uses less digits than its factorization.

2640545565554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374758385.

The product of its (nonzero) digits is 72000000, while the sum is 56.

The spelling of 2640545565554 in words is "two trillion, six hundred forty billion, five hundred forty-five million, five hundred sixty-five thousand, five hundred fifty-four".