81926367307 has 4 divisors (see below), whose sum is σ = 81936226096. Its totient is φ = 81916508520.

The previous prime is 81926367277. The next prime is 81926367317. The reversal of 81926367307 is 70376362918.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81926367307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81926367317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4916919 + ... + 4933552.

It is an arithmetic number, because the mean of its divisors is an integer number (20484056524).

Almost surely, 2^81926367307 is an apocalyptic number.

81926367307 is a deficient number, since it is larger than the sum of its proper divisors (9858789).

81926367307 is an equidigital number, since it uses as much as digits as its factorization.

81926367307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9858788.

The product of its (nonzero) digits is 2286144, while the sum is 52.

The spelling of 81926367307 in words is "eighty-one billion, nine hundred twenty-six million, three hundred sixty-seven thousand, three hundred seven".