81262916 has 24 divisors (see below), whose sum is σ = 162716736. Its totient is φ = 34786080.

The previous prime is 81262903. The next prime is 81262927. The reversal of 81262916 is 61926218.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45806 + ... + 47546.

It is an arithmetic number, because the mean of its divisors is an integer number (6779864).

Almost surely, 2^81262916 is an apocalyptic number.

It is an amenable number.

81262916 is an abundant number, since it is smaller than the sum of its proper divisors (81453820).

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

81262916 is a wasteful number, since it uses less digits than its factorization.

81262916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3419 (or 3417 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 81262916 is about 9014.5946109628. The cubic root of 81262916 is about 433.1425019043.

The spelling of 81262916 in words is "eighty-one million, two hundred sixty-two thousand, nine hundred sixteen".