81179146 has 16 divisors (see below), whose sum is σ = 125574624. Its totient is φ = 39339664.

The previous prime is 81179117. The next prime is 81179171. The reversal of 81179146 is 64197118.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4185 + ... + 13411.

It is an arithmetic number, because the mean of its divisors is an integer number (7848414).

Almost surely, 2^81179146 is an apocalyptic number.

81179146 is a deficient number, since it is larger than the sum of its proper divisors (44395478).

81179146 is a wasteful number, since it uses less digits than its factorization.

81179146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9365.

The product of its digits is 12096, while the sum is 37.

The square root of 81179146 is about 9009.9470586680. The cubic root of 81179146 is about 432.9936155313.

The spelling of 81179146 in words is "eighty-one million, one hundred seventy-nine thousand, one hundred forty-six".