2281078649 has 16 divisors (see below), whose sum is σ = 2545764480. Its totient is φ = 2031194880.

The previous prime is 2281078603. The next prime is 2281078651. The reversal of 2281078649 is 9468701822.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2281078649 - 2¹⁶ = 2281013113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2281071649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261539 + ... + 270119.

It is an arithmetic number, because the mean of its divisors is an integer number (159110280).

Almost surely, 2^2281078649 is an apocalyptic number.

It is an amenable number.

2281078649 is a deficient number, since it is larger than the sum of its proper divisors (264685831).

2281078649 is a wasteful number, since it uses less digits than its factorization.

2281078649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9440.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 2281078649 is about 47760.6391184205. The cubic root of 2281078649 is about 1316.3763965011.

The spelling of 2281078649 in words is "two billion, two hundred eighty-one million, seventy-eight thousand, six hundred forty-nine".