71891056 has 20 divisors (see below), whose sum is σ = 139789912. Its totient is φ = 35816256.

The previous prime is 71891051. The next prime is 71891101. The reversal of 71891056 is 65019817.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71891051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3411 + ... + 12466.

Almost surely, 2^71891056 is an apocalyptic number.

It is an amenable number.

71891056 is a deficient number, since it is larger than the sum of its proper divisors (67898856).

71891056 is a wasteful number, since it uses less digits than its factorization.

71891056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16168 (or 16162 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 71891056 is about 8478.8593572485. The cubic root of 71891056 is about 415.8068321614.

The spelling of 71891056 in words is "seventy-one million, eight hundred ninety-one thousand, fifty-six".