22278678399 has 32 divisors (see below), whose sum is σ = 34769088000. Its totient is φ = 14060008512.

The previous prime is 22278678397. The next prime is 22278678403. The reversal of 22278678399 is 99387687222.

It is not a de Polignac number, because 22278678399 - 2¹ = 22278678397 is a prime.

It is a super-2 number, since 2×22278678399² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22278678397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 685387 + ... + 717155.

It is an arithmetic number, because the mean of its divisors is an integer number (1086534000).

Almost surely, 2^22278678399 is an apocalyptic number.

22278678399 is a deficient number, since it is larger than the sum of its proper divisors (12490409601).

22278678399 is a wasteful number, since it uses less digits than its factorization.

22278678399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33164 (or 33158 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 63.

The spelling of 22278678399 in words is "twenty-two billion, two hundred seventy-eight million, six hundred seventy-eight thousand, three hundred ninety-nine".