81883256197 has 8 divisors (see below), whose sum is σ = 86198198400. Its totient is φ = 77568843744.

The previous prime is 81883256183. The next prime is 81883256201. The reversal of 81883256197 is 79165238818.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81883256197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81883256597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207204 + ... + 454642.

It is an arithmetic number, because the mean of its divisors is an integer number (10774774800).

Almost surely, 2^81883256197 is an apocalyptic number.

It is an amenable number.

81883256197 is a deficient number, since it is larger than the sum of its proper divisors (4314942203).

81883256197 is a wasteful number, since it uses less digits than its factorization.

81883256197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264875.

The product of its digits is 5806080, while the sum is 58.

The spelling of 81883256197 in words is "eighty-one billion, eight hundred eighty-three million, two hundred fifty-six thousand, one hundred ninety-seven".