27187008680 has 128 divisors (see below), whose sum is σ = 68706247680. Its totient is φ = 9613762560.

The previous prime is 27187008679. The next prime is 27187008689. The reversal of 27187008680 is 8680078172.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (27187008689) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1554947 + ... + 1572333.

It is an arithmetic number, because the mean of its divisors is an integer number (536767560).

Almost surely, 2^27187008680 is an apocalyptic number.

27187008680 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 27187008680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34353123840).

27187008680 is an abundant number, since it is smaller than the sum of its proper divisors (41519239000).

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

27187008680 is a wasteful number, since it uses less digits than its factorization.

27187008680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17539 (or 17535 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 47.

The spelling of 27187008680 in words is "twenty-seven billion, one hundred eighty-seven million, eight thousand, six hundred eighty".