81653110 has 48 divisors (see below), whose sum is σ = 186526800. Its totient is φ = 25448640.

The previous prime is 81653107. The next prime is 81653119. The reversal of 81653110 is 1135618.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81653119) 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, 2185 + ... + 12964.

It is an arithmetic number, because the mean of its divisors is an integer number (3885975).

Almost surely, 2^81653110 is an apocalyptic number.

81653110 is an abundant number, since it is smaller than the sum of its proper divisors (104873690).

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

81653110 is a wasteful number, since it uses less digits than its factorization.

81653110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15181 (or 15174 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 81653110 is about 9036.2110422455. The cubic root of 81653110 is about 433.8346577941.

Adding to 81653110 its reverse (1135618), we get a palindrome (82788728).

The spelling of 81653110 in words is "eighty-one million, six hundred fifty-three thousand, one hundred ten".