81096534 has 24 divisors (see below), whose sum is σ = 175894992. Its totient is φ = 27003600.

The previous prime is 81096523. The next prime is 81096539. The reversal of 81096534 is 43569018.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81096539) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21687 + ... + 25149.

It is an arithmetic number, because the mean of its divisors is an integer number (7328958).

Almost surely, 2^81096534 is an apocalyptic number.

81096534 is an abundant number, since it is smaller than the sum of its proper divisors (94798458).

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

81096534 is a wasteful number, since it uses less digits than its factorization.

81096534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4772 (or 4769 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 81096534 is about 9005.3614030754. The cubic root of 81096534 is about 432.8466869536.

It can be divided in two parts, 810 and 96534, that added together give a square (97344 = 312²).

The spelling of 81096534 in words is "eighty-one million, ninety-six thousand, five hundred thirty-four".