81156627 has 16 divisors (see below), whose sum is σ = 125460480. Its totient is φ = 51751656.

The previous prime is 81156601. The next prime is 81156637. The reversal of 81156627 is 72665118.

It is not a de Polignac number, because 81156627 - 2⁶ = 81156563 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81156591 and 81156600.

It is not an unprimeable number, because it can be changed into a prime (81156637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64723 + ... + 65964.

It is an arithmetic number, because the mean of its divisors is an integer number (7841280).

Almost surely, 2^81156627 is an apocalyptic number.

81156627 is a deficient number, since it is larger than the sum of its proper divisors (44303853).

81156627 is a wasteful number, since it uses less digits than its factorization.

81156627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130719 (or 130713 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 81156627 is about 9008.6972976119. The cubic root of 81156627 is about 432.9535745214.

The spelling of 81156627 in words is "eighty-one million, one hundred fifty-six thousand, six hundred twenty-seven".