81465862111 has 16 divisors (see below), whose sum is σ = 84627396000. Its totient is φ = 78328430208.

The previous prime is 81465862103. The next prime is 81465862141. The reversal of 81465862111 is 11126856418.

It is not a de Polignac number, because 81465862111 - 2³ = 81465862103 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 (81465862141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8365201 + ... + 8374933.

It is an arithmetic number, because the mean of its divisors is an integer number (5289212250).

Almost surely, 2^81465862111 is an apocalyptic number.

81465862111 is a deficient number, since it is larger than the sum of its proper divisors (3161533889).

81465862111 is a wasteful number, since it uses less digits than its factorization.

81465862111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10938.

The product of its digits is 92160, while the sum is 43.

The spelling of 81465862111 in words is "eighty-one billion, four hundred sixty-five million, eight hundred sixty-two thousand, one hundred eleven".