81465862067 has 2 divisors, whose sum is σ = 81465862068. Its totient is φ = 81465862066.

The previous prime is 81465862039. The next prime is 81465862091. The reversal of 81465862067 is 76026856418.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81465862067 - 2⁶ = 81465862003 is a prime.

It is not a weakly prime, because it can be changed into another prime (81465882067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40732931033 + 40732931034.

It is an arithmetic number, because the mean of its divisors is an integer number (40732931034).

Almost surely, 2^81465862067 is an apocalyptic number.

81465862067 is a deficient number, since it is larger than the sum of its proper divisors (1).

81465862067 is an equidigital number, since it uses as much as digits as its factorization.

81465862067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 81465862067 in words is "eighty-one billion, four hundred sixty-five million, eight hundred sixty-two thousand, sixty-seven".