22550778426 has 128 divisors (see below), whose sum is σ = 54813024000. Its totient is φ = 6104678400.

The previous prime is 22550778407. The next prime is 22550778427. The reversal of 22550778426 is 62487705522.

It is not an unprimeable number, because it can be changed into a prime (22550778427) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1695450 + ... + 1708698.

It is an arithmetic number, because the mean of its divisors is an integer number (428226750).

Almost surely, 2^22550778426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22550778426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27406512000).

22550778426 is an abundant number, since it is smaller than the sum of its proper divisors (32262245574).

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

22550778426 is a wasteful number, since it uses less digits than its factorization.

22550778426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13360.

The product of its (nonzero) digits is 1881600, while the sum is 48.

The spelling of 22550778426 in words is "twenty-two billion, five hundred fifty million, seven hundred seventy-eight thousand, four hundred twenty-six".