81675697602 has 8 divisors (see below), whose sum is σ = 163351395216. Its totient is φ = 27225232532.

The previous prime is 81675697591. The next prime is 81675697603. The reversal of 81675697602 is 20679657618.

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

81675697602 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (81675697603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6806308128 + ... + 6806308139.

It is an arithmetic number, because the mean of its divisors is an integer number (20418924402).

Almost surely, 2^81675697602 is an apocalyptic number.

81675697602 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.

81675697602 is a wasteful number, since it uses less digits than its factorization.

81675697602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13612616272.

The product of its (nonzero) digits is 7620480, while the sum is 57.

The spelling of 81675697602 in words is "eighty-one billion, six hundred seventy-five million, six hundred ninety-seven thousand, six hundred two".