71081944 has 8 divisors (see below), whose sum is σ = 133278660. Its totient is φ = 35540968.

The previous prime is 71081939. The next prime is 71081951. The reversal of 71081944 is 44918017.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4442614 + ... + 4442629.

Almost surely, 2^71081944 is an apocalyptic number.

It is an amenable number.

71081944 is a deficient number, since it is larger than the sum of its proper divisors (62196716).

71081944 is a wasteful number, since it uses less digits than its factorization.

71081944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8885249 (or 8885245 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 71081944 is about 8431.0108527981. The cubic root of 71081944 is about 414.2410165921.

The spelling of 71081944 in words is "seventy-one million, eighty-one thousand, nine hundred forty-four".