81069080 has 16 divisors (see below), whose sum is σ = 182405520. Its totient is φ = 32427616.

The previous prime is 81069049. The next prime is 81069083. The reversal of 81069080 is 8096018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81069083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1013324 + ... + 1013403.

It is an arithmetic number, because the mean of its divisors is an integer number (11400345).

Almost surely, 2^81069080 is an apocalyptic number.

It is an amenable number.

81069080 is an abundant number, since it is smaller than the sum of its proper divisors (101336440).

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

81069080 is a wasteful number, since it uses less digits than its factorization.

81069080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026738 (or 2026734 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 81069080 is about 9003.8369598744. The cubic root of 81069080 is about 432.7978368833.

The spelling of 81069080 in words is "eighty-one million, sixty-nine thousand, eighty".