27081195840 has 252 divisors, whose sum is σ = 98952678396. Its totient is φ = 6796640256.

The previous prime is 27081195839. The next prime is 27081195859. The reversal of 27081195840 is 4859118072.

It can be written as a sum of positive squares in 6 ways, for example, as 533055744 + 26548140096 = 23088^2 + 162936^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 816052 + ... + 848588.

Almost surely, 2^27081195840 is an apocalyptic number.

27081195840 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 27081195840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49476339198).

27081195840 is an abundant number, since it is smaller than the sum of its proper divisors (71871482556).

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

27081195840 is a wasteful number, since it uses less digits than its factorization.

27081195840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32594 (or 32564 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 27081195840 in words is "twenty-seven billion, eighty-one million, one hundred ninety-five thousand, eight hundred forty".