81464411 has 12 divisors (see below), whose sum is σ = 94965192. Its totient is φ = 69679008.

The previous prime is 81464407. The next prime is 81464443. The reversal of 81464411 is 11446418.

It is not a de Polignac number, because 81464411 - 2² = 81464407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81464711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26111 + ... + 29063.

It is an arithmetic number, because the mean of its divisors is an integer number (7913766).

Almost surely, 2^81464411 is an apocalyptic number.

81464411 is a deficient number, since it is larger than the sum of its proper divisors (13500781).

81464411 is a wasteful number, since it uses less digits than its factorization.

81464411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3530 (or 3523 counting only the distinct ones).

The product of its digits is 3072, while the sum is 29.

The square root of 81464411 is about 9025.7637349977. The cubic root of 81464411 is about 433.5002050936.

The spelling of 81464411 in words is "eighty-one million, four hundred sixty-four thousand, four hundred eleven".