27091991260 has 96 divisors (see below), whose sum is σ = 59184276480. Its totient is φ = 10408704768.

The previous prime is 27091991243. The next prime is 27091991281. The reversal of 27091991260 is 6219919072.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 27091991260.

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, 36659971 + ... + 36660709.

It is an arithmetic number, because the mean of its divisors is an integer number (616502880).

Almost surely, 2^27091991260 is an apocalyptic number.

27091991260 is a gapful number since it is divisible by the number (20) 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 27091991260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29592138240).

27091991260 is an abundant number, since it is smaller than the sum of its proper divisors (32092285220).

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

27091991260 is a wasteful number, since it uses less digits than its factorization.

27091991260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355 (or 1353 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 46.

The spelling of 27091991260 in words is "twenty-seven billion, ninety-one million, nine hundred ninety-one thousand, two hundred sixty".