22778891055 has 24 divisors (see below), whose sum is σ = 39558946128. Its totient is φ = 12125500416.

The previous prime is 22778891053. The next prime is 22778891071. The reversal of 22778891055 is 55019887722.

It is not a de Polignac number, because 22778891055 - 2¹ = 22778891053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22778890992 and 22778891010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22778891053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 460402 + ... + 507471.

It is an arithmetic number, because the mean of its divisors is an integer number (1648289422).

Almost surely, 2^22778891055 is an apocalyptic number.

22778891055 is a deficient number, since it is larger than the sum of its proper divisors (16780055073).

22778891055 is a wasteful number, since it uses less digits than its factorization.

22778891055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968407 (or 968404 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 54.

The spelling of 22778891055 in words is "twenty-two billion, seven hundred seventy-eight million, eight hundred ninety-one thousand, fifty-five".