81094660 has 24 divisors (see below), whose sum is σ = 179262720. Its totient is φ = 30730464.

The previous prime is 81094649. The next prime is 81094661. The reversal of 81094660 is 6649018.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (81094661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106324 + ... + 107083.

It is an arithmetic number, because the mean of its divisors is an integer number (7469280).

Almost surely, 2^81094660 is an apocalyptic number.

It is an amenable number.

81094660 is an abundant number, since it is smaller than the sum of its proper divisors (98168060).

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

81094660 is a wasteful number, since it uses less digits than its factorization.

81094660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213435 (or 213433 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 81094660 is about 9005.2573533464. The cubic root of 81094660 is about 432.8433528163.

It can be divided in two parts, 8109 and 4660, that added together give a square (12769 = 113²).

The spelling of 81094660 in words is "eighty-one million, ninety-four thousand, six hundred sixty".