81676109023 has 2 divisors, whose sum is σ = 81676109024. Its totient is φ = 81676109022.

The previous prime is 81676108967. The next prime is 81676109069. The reversal of 81676109023 is 32090167618.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81676109023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81676109083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40838054511 + 40838054512.

It is an arithmetic number, because the mean of its divisors is an integer number (40838054512).

Almost surely, 2^81676109023 is an apocalyptic number.

81676109023 is a deficient number, since it is larger than the sum of its proper divisors (1).

81676109023 is an equidigital number, since it uses as much as digits as its factorization.

81676109023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 81676109023 in words is "eighty-one billion, six hundred seventy-six million, one hundred nine thousand, twenty-three".