2206778144 has 24 divisors (see below), whose sum is σ = 4348756188. Its totient is φ = 1102332160.

The previous prime is 2206778117. The next prime is 2206778173. The reversal of 2206778144 is 4418776022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2165971600 + 40806544 = 46540^2 + 6388^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1454 + ... + 66450.

Almost surely, 2^2206778144 is an apocalyptic number.

It is an amenable number.

2206778144 is a deficient number, since it is larger than the sum of its proper divisors (2141978044).

2206778144 is a wasteful number, since it uses less digits than its factorization.

2206778144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66068 (or 66060 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 41.

The square root of 2206778144 is about 46976.3572874696. The cubic root of 2206778144 is about 1301.9257738263.

The spelling of 2206778144 in words is "two billion, two hundred six million, seven hundred seventy-eight thousand, one hundred forty-four".