81676108967 has 2 divisors, whose sum is σ = 81676108968. Its totient is φ = 81676108966.

The previous prime is 81676108961. The next prime is 81676109023. The reversal of 81676108967 is 76980167618.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81676108967 - 2²⁶ = 81609000103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81676108961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40838054483 + 40838054484.

It is an arithmetic number, because the mean of its divisors is an integer number (40838054484).

Almost surely, 2^81676108967 is an apocalyptic number.

81676108967 is a deficient number, since it is larger than the sum of its proper divisors (1).

81676108967 is an equidigital number, since it uses as much as digits as its factorization.

81676108967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6096384, while the sum is 59.

The spelling of 81676108967 in words is "eighty-one billion, six hundred seventy-six million, one hundred eight thousand, nine hundred sixty-seven".