81092010 has 16 divisors (see below), whose sum is σ = 194620896. Its totient is φ = 21624528.

The previous prime is 81092009. The next prime is 81092017. The reversal of 81092010 is 1029018.

It is not an unprimeable number, because it can be changed into a prime (81092017) 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, 1351504 + ... + 1351563.

It is an arithmetic number, because the mean of its divisors is an integer number (12163806).

Almost surely, 2^81092010 is an apocalyptic number.

81092010 is an abundant number, since it is smaller than the sum of its proper divisors (113528886).

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

81092010 is a wasteful number, since it uses less digits than its factorization.

81092010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2703077.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 81092010 is about 9005.1102158719. The cubic root of 81092010 is about 432.8386379667.

The spelling of 81092010 in words is "eighty-one million, ninety-two thousand, ten".