27136436520 has 128 divisors (see below), whose sum is σ = 84135075840. Its totient is φ = 6994648320.

The previous prime is 27136436491. The next prime is 27136436629. The reversal of 27136436520 is 2563463172.

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, 3518989 + ... + 3526691.

It is an arithmetic number, because the mean of its divisors is an integer number (657305280).

Almost surely, 2^27136436520 is an apocalyptic number.

27136436520 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 27136436520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42067537920).

27136436520 is an abundant number, since it is smaller than the sum of its proper divisors (56998639320).

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

27136436520 is a wasteful number, since it uses less digits than its factorization.

27136436520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8695 (or 8691 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 39.

Adding to 27136436520 its reverse (2563463172), we get a palindrome (29699899692).

The spelling of 27136436520 in words is "twenty-seven billion, one hundred thirty-six million, four hundred thirty-six thousand, five hundred twenty".