81602173352 has 16 divisors (see below), whose sum is σ = 174861800160. Its totient is φ = 34972359984.

The previous prime is 81602173349. The next prime is 81602173361. The reversal of 81602173352 is 25337120618.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 728590778 + ... + 728590889.

It is an arithmetic number, because the mean of its divisors is an integer number (10928862510).

Almost surely, 2^81602173352 is an apocalyptic number.

It is an amenable number.

81602173352 is an abundant number, since it is smaller than the sum of its proper divisors (93259626808).

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

81602173352 is a wasteful number, since it uses less digits than its factorization.

81602173352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457181680 (or 1457181676 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 81602173352 in words is "eighty-one billion, six hundred two million, one hundred seventy-three thousand, three hundred fifty-two".