27821422458 has 64 divisors (see below), whose sum is σ = 62460720000. Its totient is φ = 9178670592.

The previous prime is 27821422441. The next prime is 27821422459. The reversal of 27821422458 is 85422412872.

It is not an unprimeable number, because it can be changed into a prime (27821422459) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10913368 + ... + 10915916.

It is an arithmetic number, because the mean of its divisors is an integer number (975948750).

Almost surely, 2^27821422458 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27821422458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31230360000).

27821422458 is an abundant number, since it is smaller than the sum of its proper divisors (34639297542).

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

27821422458 is a wasteful number, since it uses less digits than its factorization.

27821422458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4556 (or 4550 counting only the distinct ones).

The product of its digits is 573440, while the sum is 45.

The spelling of 27821422458 in words is "twenty-seven billion, eight hundred twenty-one million, four hundred twenty-two thousand, four hundred fifty-eight".