81650996 has 12 divisors (see below), whose sum is σ = 163302048. Its totient is φ = 34993272.

The previous prime is 81650981. The next prime is 81651007. The reversal of 81650996 is 69905618.

81650996 is an admirable number.

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, 1458026 + ... + 1458081.

It is an arithmetic number, because the mean of its divisors is an integer number (13608504).

Almost surely, 2^81650996 is an apocalyptic number.

It is an amenable number.

81650996 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81650996 is a wasteful number, since it uses less digits than its factorization.

81650996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916118 (or 2916116 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 81650996 is about 9036.0940676821. The cubic root of 81650996 is about 433.8309137669.

The spelling of 81650996 in words is "eighty-one million, six hundred fifty thousand, nine hundred ninety-six".