22778040249 has 12 divisors (see below), whose sum is σ = 32913893376. Its totient is φ = 15179692632.

The previous prime is 22778040247. The next prime is 22778040269. The reversal of 22778040249 is 94204087722.

It is not a de Polignac number, because 22778040249 - 2¹ = 22778040247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22778040247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 446769 + ... + 495134.

It is an arithmetic number, because the mean of its divisors is an integer number (2742824448).

Almost surely, 2^22778040249 is an apocalyptic number.

It is an amenable number.

22778040249 is a deficient number, since it is larger than the sum of its proper divisors (10135853127).

22778040249 is a wasteful number, since it uses less digits than its factorization.

22778040249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944596 (or 944593 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 22778040249 in words is "twenty-two billion, seven hundred seventy-eight million, forty thousand, two hundred forty-nine".