27780444552 has 96 divisors (see below), whose sum is σ = 81078541920. Its totient is φ = 7908929280.

The previous prime is 27780444541. The next prime is 27780444553. The reversal of 27780444552 is 25544408772.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (27780444553) 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, 288423 + ... + 372489.

It is an arithmetic number, because the mean of its divisors is an integer number (844568145).

Almost surely, 2^27780444552 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 27780444552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40539270960).

27780444552 is an abundant number, since it is smaller than the sum of its proper divisors (53298097368).

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

27780444552 is a wasteful number, since it uses less digits than its factorization.

27780444552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84371 (or 84360 counting only the distinct ones).

The product of its (nonzero) digits is 2508800, while the sum is 48.

The spelling of 27780444552 in words is "twenty-seven billion, seven hundred eighty million, four hundred forty-four thousand, five hundred fifty-two".