81106474 has 8 divisors (see below), whose sum is σ = 123721920. Its totient is φ = 39865836.

The previous prime is 81106469. The next prime is 81106499. The reversal of 81106474 is 47460118.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343554 + ... + 343789.

It is an arithmetic number, because the mean of its divisors is an integer number (15465240).

Almost surely, 2^81106474 is an apocalyptic number.

81106474 is a deficient number, since it is larger than the sum of its proper divisors (42615446).

81106474 is a wasteful number, since it uses less digits than its factorization.

81106474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687404.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 81106474 is about 9005.9132796180. The cubic root of 81106474 is about 432.8643709001.

The spelling of 81106474 in words is "eighty-one million, one hundred six thousand, four hundred seventy-four".