81150281086 has 16 divisors (see below), whose sum is σ = 139125242880. Its totient is φ = 34776073080.

The previous prime is 81150281083. The next prime is 81150281089. The reversal of 81150281086 is 68018205118.

It is an interprime number because it is at equal distance from previous prime (81150281083) and next prime (81150281089).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81150281083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19426 + ... + 403333.

It is an arithmetic number, because the mean of its divisors is an integer number (8695327680).

Almost surely, 2^81150281086 is an apocalyptic number.

81150281086 is a deficient number, since it is larger than the sum of its proper divisors (57974961794).

81150281086 is a wasteful number, since it uses less digits than its factorization.

81150281086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436479.

The product of its (nonzero) digits is 30720, while the sum is 40.

The spelling of 81150281086 in words is "eighty-one billion, one hundred fifty million, two hundred eighty-one thousand, eighty-six".