27291091000 has 64 divisors (see below), whose sum is σ = 63965772000. Its totient is φ = 10898553600.

The previous prime is 27291090997. The next prime is 27291091007. The reversal of 27291091000 is 19019272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27291091007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 596956 + ... + 641044.

Almost surely, 2^27291091000 is an apocalyptic number.

27291091000 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 27291091000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31982886000).

27291091000 is an abundant number, since it is smaller than the sum of its proper divisors (36674681000).

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

27291091000 is a wasteful number, since it uses less digits than its factorization.

27291091000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44729 (or 44715 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 31.

The spelling of 27291091000 in words is "twenty-seven billion, two hundred ninety-one million, ninety-one thousand".