71641018 has 16 divisors (see below), whose sum is σ = 108789120. Its totient is φ = 35380800.

The previous prime is 71640979. The next prime is 71641033. The reversal of 71641018 is 81014617.

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 7 ways as a sum of consecutive naturals, for example, 70498 + ... + 71506.

It is an arithmetic number, because the mean of its divisors is an integer number (6799320).

Almost surely, 2^71641018 is an apocalyptic number.

71641018 is a deficient number, since it is larger than the sum of its proper divisors (37148102).

71641018 is a wasteful number, since it uses less digits than its factorization.

71641018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1413.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 71641018 is about 8464.1017243415. The cubic root of 71641018 is about 415.3242117384.

The spelling of 71641018 in words is "seventy-one million, six hundred forty-one thousand, eighteen".