27243871524 has 72 divisors (see below), whose sum is σ = 71522713080. Its totient is φ = 8736532992.

The previous prime is 27243871493. The next prime is 27243871553. The reversal of 27243871524 is 42517834272.

27243871524 is a `hidden beast` number, since 2 + 7 + 2 + 43 + 87 + 1 + 524 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 10868062500 + 16375809024 = 104250^2 + 127968^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 27243871524.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3642 + ... + 233454.

It is an arithmetic number, because the mean of its divisors is an integer number (993371015).

Almost surely, 2^27243871524 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27243871524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35761356540).

27243871524 is an abundant number, since it is smaller than the sum of its proper divisors (44278841556).

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

27243871524 is a wasteful number, since it uses less digits than its factorization.

27243871524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229949 (or 229944 counting only the distinct ones).

The product of its digits is 752640, while the sum is 45.

The spelling of 27243871524 in words is "twenty-seven billion, two hundred forty-three million, eight hundred seventy-one thousand, five hundred twenty-four".