81926411 has 8 divisors (see below), whose sum is σ = 94314720. Its totient is φ = 69709248.

The previous prime is 81926407. The next prime is 81926413. The reversal of 81926411 is 11462918.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81926411 - 2² = 81926407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81926413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41756 + ... + 43673.

It is an arithmetic number, because the mean of its divisors is an integer number (11789340).

Almost surely, 2^81926411 is an apocalyptic number.

81926411 is a deficient number, since it is larger than the sum of its proper divisors (12388309).

81926411 is a wasteful number, since it uses less digits than its factorization.

81926411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85573.

The product of its digits is 3456, while the sum is 32.

The square root of 81926411 is about 9051.3209533195. The cubic root of 81926411 is about 434.3181478722.

The spelling of 81926411 in words is "eighty-one million, nine hundred twenty-six thousand, four hundred eleven".