81647307367 has 8 divisors (see below), whose sum is σ = 85511577600. Its totient is φ = 77809236120.

The previous prime is 81647307361. The next prime is 81647307373. The reversal of 81647307367 is 76370374618.

It is an interprime number because it is at equal distance from previous prime (81647307361) and next prime (81647307373).

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

It is a cyclic number.

It is not a de Polignac number, because 81647307367 - 2²³ = 81638918759 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 (81647307361) 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, 6543367 + ... + 6555832.

It is an arithmetic number, because the mean of its divisors is an integer number (10688947200).

Almost surely, 2^81647307367 is an apocalyptic number.

81647307367 is a deficient number, since it is larger than the sum of its proper divisors (3864270233).

81647307367 is a wasteful number, since it uses less digits than its factorization.

81647307367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13099493.

The product of its (nonzero) digits is 3556224, while the sum is 52.

The spelling of 81647307367 in words is "eighty-one billion, six hundred forty-seven million, three hundred seven thousand, three hundred sixty-seven".