22278896640 has 2112 divisors, whose sum is σ = 112907934720. Its totient is φ = 4087480320.

The previous prime is 22278896597. The next prime is 22278896657. The reversal of 22278896640 is 4669887222.

It is a tau number, because it is divible by the number of its divisors (2112).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 968647669 + ... + 968647691.

Almost surely, 2^22278896640 is an apocalyptic number.

22278896640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22278896640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56453967360).

22278896640 is an abundant number, since it is smaller than the sum of its proper divisors (90629038080).

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

22278896640 is a wasteful number, since it uses less digits than its factorization.

22278896640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 22278896640 in words is "twenty-two billion, two hundred seventy-eight million, eight hundred ninety-six thousand, six hundred forty".