22278799478268 has 18 divisors (see below), whose sum is σ = 56315854236824. Its totient is φ = 7426266492744.

The previous prime is 22278799478263. The next prime is 22278799478281. The reversal of 22278799478268 is 86287499787222.

22278799478268 is a `hidden beast` number, since 2 + 2 + 2 + 7 + 87 + 9 + 9 + 478 + 2 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×22278799478268³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22278799478263) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 309427770496 + ... + 309427770567.

Almost surely, 2^{22278799478268} is an apocalyptic number.

It is an amenable number.

22278799478268 is an abundant number, since it is smaller than the sum of its proper divisors (34037054758556).

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

22278799478268 is a wasteful number, since it uses less digits than its factorization.

22278799478268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618855541073 (or 618855541068 counting only the distinct ones).

The product of its digits is 5462360064, while the sum is 81.

The spelling of 22278799478268 in words is "twenty-two trillion, two hundred seventy-eight billion, seven hundred ninety-nine million, four hundred seventy-eight thousand, two hundred sixty-eight".