2206744778628 has 54 divisors (see below), whose sum is σ = 6040256558154. Its totient is φ = 678998391552.

The previous prime is 2206744778597. The next prime is 2206744778677. The reversal of 2206744778628 is 8268774476022.

It is a happy number.

2206744778628 is a `hidden beast` number, since 2 + 2 + 0 + 67 + 4 + 477 + 86 + 28 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 182561361984 + 2024183416644 = 427272^2 + 1422738^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 181350325 + ... + 181362492.

Almost surely, 2^{2206744778628} is an apocalyptic number.

It is an amenable number.

2206744778628 is an abundant number, since it is smaller than the sum of its proper divisors (3833511779526).

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

2206744778628 is a wasteful number, since it uses less digits than its factorization.

2206744778628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362712853 (or 362712835 counting only the distinct ones).

The product of its (nonzero) digits is 101154816, while the sum is 63.

The spelling of 2206744778628 in words is "two trillion, two hundred six billion, seven hundred forty-four million, seven hundred seventy-eight thousand, six hundred twenty-eight".