81120676 has 108 divisors (see below), whose sum is σ = 186923520. Its totient is φ = 30663360.

The previous prime is 81120653. The next prime is 81120679. The reversal of 81120676 is 67602118.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (81120679) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1026805 + ... + 1026883.

Almost surely, 2^81120676 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81120676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93461760).

81120676 is an abundant number, since it is smaller than the sum of its proper divisors (105802844).

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

81120676 is a wasteful number, since it uses less digits than its factorization.

81120676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 81120676 is about 9006.7017270475. The cubic root of 81120676 is about 432.8896347321.

It can be divided in two parts, 81120 and 676, that added together give a square (81796 = 286²).

The spelling of 81120676 in words is "eighty-one million, one hundred twenty thousand, six hundred seventy-six".