71641011 has 8 divisors (see below), whose sum is σ = 102869200. Its totient is φ = 44086752.

The previous prime is 71640979. The next prime is 71641033. The reversal of 71641011 is 11014617.

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

It is not a de Polignac number, because 71641011 - 2⁵ = 71640979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71641051) by changing a digit.

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, 918436 + ... + 918513.

It is an arithmetic number, because the mean of its divisors is an integer number (12858650).

Almost surely, 2^71641011 is an apocalyptic number.

71641011 is a deficient number, since it is larger than the sum of its proper divisors (31228189).

71641011 is a wasteful number, since it uses less digits than its factorization.

71641011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836965.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 71641011 is about 8464.1013108303. The cubic root of 71641011 is about 415.3241982113.

Adding to 71641011 its reverse (11014617), we get a palindrome (82655628).

The spelling of 71641011 in words is "seventy-one million, six hundred forty-one thousand, eleven".