71011144 has 8 divisors (see below), whose sum is σ = 133145910. Its totient is φ = 35505568.

The previous prime is 71011141. The next prime is 71011153. The reversal of 71011144 is 44111017.

It can be written as a sum of positive squares in only one way, i.e., 51984100 + 19027044 = 7210^2 + 4362^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (71011141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4438189 + ... + 4438204.

Almost surely, 2^71011144 is an apocalyptic number.

It is an amenable number.

71011144 is a deficient number, since it is larger than the sum of its proper divisors (62134766).

71011144 is a wasteful number, since it uses less digits than its factorization.

71011144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8876399 (or 8876395 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 71011144 is about 8426.8110219703. The cubic root of 71011144 is about 414.1034382563.

The spelling of 71011144 in words is "seventy-one million, eleven thousand, one hundred forty-four".