27531256536 has 224 divisors, whose sum is σ = 88802664960. Its totient is φ = 7834988736.

The previous prime is 27531256523. The next prime is 27531256603. The reversal of 27531256536 is 63565213572.

27531256536 is a `hidden beast` number, since 2 + 7 + 53 + 1 + 2 + 565 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 27531256491 and 27531256500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 11552001 + ... + 11554383.

Almost surely, 2^27531256536 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 27531256536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44401332480).

27531256536 is an abundant number, since it is smaller than the sum of its proper divisors (61271408424).

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

27531256536 is a wasteful number, since it uses less digits than its factorization.

27531256536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697 (or 2678 counting only the distinct ones).

The product of its digits is 1134000, while the sum is 45.

The spelling of 27531256536 in words is "twenty-seven billion, five hundred thirty-one million, two hundred fifty-six thousand, five hundred thirty-six".