81359110 has 48 divisors (see below), whose sum is σ = 180395424. Its totient is φ = 26251008.

The previous prime is 81359107. The next prime is 81359111. The reversal of 81359110 is 1195318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81359111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3447 + ... + 13213.

It is an arithmetic number, because the mean of its divisors is an integer number (3758238).

Almost surely, 2^81359110 is an apocalyptic number.

81359110 is an abundant number, since it is smaller than the sum of its proper divisors (99036314).

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

81359110 is a wasteful number, since it uses less digits than its factorization.

81359110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9805 (or 9798 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 81359110 is about 9019.9284919560. The cubic root of 81359110 is about 433.3133435881.

The spelling of 81359110 in words is "eighty-one million, three hundred fifty-nine thousand, one hundred ten".