2194779456 has 224 divisors, whose sum is σ = 6640250880. Its totient is φ = 710664192.

The previous prime is 2194779361. The next prime is 2194779493. The reversal of 2194779456 is 6549774912.

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 31 ways as a sum of consecutive naturals, for example, 16020220 + ... + 16020356.

Almost surely, 2^2194779456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2194779456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3320125440).

2194779456 is an abundant number, since it is smaller than the sum of its proper divisors (4445471424).

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

2194779456 is a wasteful number, since it uses less digits than its factorization.

2194779456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 342 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The square root of 2194779456 is about 46848.4733582643. The cubic root of 2194779456 is about 1299.5618752399.

The spelling of 2194779456 in words is "two billion, one hundred ninety-four million, seven hundred seventy-nine thousand, four hundred fifty-six".