27199835872 has 72 divisors (see below), whose sum is σ = 59324928768. Its totient is φ = 12265989120.

The previous prime is 27199835867. The next prime is 27199835921. The reversal of 27199835872 is 27853899172.

It is a self number, because there is not a number n which added to its sum of digits gives 27199835872.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 464088 + ... + 519400.

It is an arithmetic number, because the mean of its divisors is an integer number (823957344).

Almost surely, 2^27199835872 is an apocalyptic number.

27199835872 is a gapful number since it is divisible by the number (22) 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 27199835872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29662464384).

27199835872 is an abundant number, since it is smaller than the sum of its proper divisors (32125092896).

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

27199835872 is a wasteful number, since it uses less digits than its factorization.

27199835872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55472 (or 55453 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 61.

The spelling of 27199835872 in words is "twenty-seven billion, one hundred ninety-nine million, eight hundred thirty-five thousand, eight hundred seventy-two".