27256539520 has 128 divisors (see below), whose sum is σ = 74535920640. Its totient is φ = 9336674304.

The previous prime is 27256539503. The next prime is 27256539521. The reversal of 27256539520 is 2593565272.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27256539521) 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, 6910669 + ... + 6914611.

It is an arithmetic number, because the mean of its divisors is an integer number (582311880).

Almost surely, 2^27256539520 is an apocalyptic number.

27256539520 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 27256539520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37267960320).

27256539520 is an abundant number, since it is smaller than the sum of its proper divisors (47279381120).

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

27256539520 is a wasteful number, since it uses less digits than its factorization.

27256539520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5512 (or 5500 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 46.

The spelling of 27256539520 in words is "twenty-seven billion, two hundred fifty-six million, five hundred thirty-nine thousand, five hundred twenty".