2640022760556 has 72 divisors (see below), whose sum is σ = 6787661025600. Its totient is φ = 864944102880.

The previous prime is 2640022760443. The next prime is 2640022760561. The reversal of 2640022760556 is 6550672200462.

2640022760556 is a `hidden beast` number, since 2 + 6 + 4 + 0 + 0 + 22 + 76 + 0 + 556 = 666.

It is a super-3 number, since 3×2640022760556³ (a number of 38 digits) contains 333 as substring.

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 23 ways as a sum of consecutive naturals, for example, 12663975 + ... + 12870753.

It is an arithmetic number, because the mean of its divisors is an integer number (94273069800).

Almost surely, 2^{2640022760556} is an apocalyptic number.

It is an amenable number.

2640022760556 is an abundant number, since it is smaller than the sum of its proper divisors (4147638265044).

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

2640022760556 is a wasteful number, since it uses less digits than its factorization.

2640022760556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212859 (or 212854 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 45.

The spelling of 2640022760556 in words is "two trillion, six hundred forty billion, twenty-two million, seven hundred sixty thousand, five hundred fifty-six".