81673080802 has 16 divisors (see below), whose sum is σ = 124348216320. Its totient is φ = 40223774448.

The previous prime is 81673080793. The next prime is 81673080803. The reversal of 81673080802 is 20808037618.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (81673080803) 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, 3091224 + ... + 3117532.

It is an arithmetic number, because the mean of its divisors is an integer number (7771763520).

Almost surely, 2^81673080802 is an apocalyptic number.

81673080802 is a deficient number, since it is larger than the sum of its proper divisors (42675135518).

81673080802 is a wasteful number, since it uses less digits than its factorization.

81673080802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49545.

The product of its (nonzero) digits is 129024, while the sum is 43.

The spelling of 81673080802 in words is "eighty-one billion, six hundred seventy-three million, eighty thousand, eight hundred two".