2656654542221 has 8 divisors (see below), whose sum is σ = 2772553034880. Its totient is φ = 2540788697392.

The previous prime is 2656654542167. The next prime is 2656654542247. The reversal of 2656654542221 is 1222454566562.

2656654542221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2656654542221 is a prime.

It is a super-2 number, since 2×2656654542221² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2656654542221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656654542721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7995590 + ... + 8321223.

It is an arithmetic number, because the mean of its divisors is an integer number (346569129360).

Almost surely, 2^{2656654542221} is an apocalyptic number.

It is an amenable number.

2656654542221 is a deficient number, since it is larger than the sum of its proper divisors (115898492659).

2656654542221 is a wasteful number, since it uses less digits than its factorization.

2656654542221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16323915.

The product of its digits is 6912000, while the sum is 50.

The spelling of 2656654542221 in words is "two trillion, six hundred fifty-six billion, six hundred fifty-four million, five hundred forty-two thousand, two hundred twenty-one".