81233634 has 16 divisors (see below), whose sum is σ = 162858240. Its totient is φ = 27012720.

The previous prime is 81233627. The next prime is 81233653. The reversal of 81233634 is 43633218.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13554 + ... + 18605.

It is an arithmetic number, because the mean of its divisors is an integer number (10178640).

Almost surely, 2^81233634 is an apocalyptic number.

81233634 is an abundant number, since it is smaller than the sum of its proper divisors (81624606).

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

81233634 is a wasteful number, since it uses less digits than its factorization.

81233634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32585.

The product of its digits is 10368, while the sum is 30.

The square root of 81233634 is about 9012.9703205991. The cubic root of 81233634 is about 433.0904699603.

The spelling of 81233634 in words is "eighty-one million, two hundred thirty-three thousand, six hundred thirty-four".