71144568 has 112 divisors (see below), whose sum is σ = 218381400. Its totient is φ = 21539520.

The previous prime is 71144561. The next prime is 71144573. The reversal of 71144568 is 86544117.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71144561) 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 27 ways as a sum of consecutive naturals, for example, 63598 + ... + 64706.

Almost surely, 2^71144568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71144568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109190700).

71144568 is an abundant number, since it is smaller than the sum of its proper divisors (147236832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71144568 is a wasteful number, since it uses less digits than its factorization.

71144568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144 (or 1125 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 71144568 is about 8434.7239433191. The cubic root of 71144568 is about 414.3626312313.

The spelling of 71144568 in words is "seventy-one million, one hundred forty-four thousand, five hundred sixty-eight".