81602912 has 24 divisors (see below), whose sum is σ = 165840192. Its totient is φ = 39484800.

The previous prime is 81602903. The next prime is 81602921. The reversal of 81602912 is 21920618.

It is an interprime number because it is at equal distance from previous prime (81602903) and next prime (81602921).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40139 + ... + 42122.

It is an arithmetic number, because the mean of its divisors is an integer number (6910008).

Almost surely, 2^81602912 is an apocalyptic number.

It is an amenable number.

81602912 is an abundant number, since it is smaller than the sum of its proper divisors (84237280).

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

81602912 is a wasteful number, since it uses less digits than its factorization.

81602912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82302 (or 82294 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 81602912 is about 9033.4330129802. The cubic root of 81602912 is about 433.7457365171.

The spelling of 81602912 in words is "eighty-one million, six hundred two thousand, nine hundred twelve".