81602173353 has 8 divisors (see below), whose sum is σ = 108805378528. Its totient is φ = 54400208544.

The previous prime is 81602173349. The next prime is 81602173361. The reversal of 81602173353 is 35337120618.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81602173353 - 2² = 81602173349 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81602183353) 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, 143851 + ... + 428832.

It is an arithmetic number, because the mean of its divisors is an integer number (13600672316).

Almost surely, 2^81602173353 is an apocalyptic number.

It is an amenable number.

81602173353 is a deficient number, since it is larger than the sum of its proper divisors (27203205175).

81602173353 is a wasteful number, since it uses less digits than its factorization.

81602173353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620183.

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 81602173353 in words is "eighty-one billion, six hundred two million, one hundred seventy-three thousand, three hundred fifty-three".