27726774558 has 96 divisors (see below), whose sum is σ = 65271548160. Its totient is φ = 7828410240.

The previous prime is 27726774557. The next prime is 27726774587. The reversal of 27726774558 is 85547762772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27726774553) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24558138 + ... + 24559266.

It is an arithmetic number, because the mean of its divisors is an integer number (679911960).

Almost surely, 2^27726774558 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27726774558, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32635774080).

27726774558 is an abundant number, since it is smaller than the sum of its proper divisors (37544773602).

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

27726774558 is a wasteful number, since it uses less digits than its factorization.

27726774558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062 (or 2055 counting only the distinct ones).

The product of its digits is 46099200, while the sum is 60.

The spelling of 27726774558 in words is "twenty-seven billion, seven hundred twenty-six million, seven hundred seventy-four thousand, five hundred fifty-eight".