71580016 has 10 divisors (see below), whose sum is σ = 138686312. Its totient is φ = 35790000.

The previous prime is 71580007. The next prime is 71580017. The reversal of 71580016 is 61008517.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71580017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2236860 + ... + 2236891.

Almost surely, 2^71580016 is an apocalyptic number.

It is an amenable number.

71580016 is a deficient number, since it is larger than the sum of its proper divisors (67106296).

71580016 is a wasteful number, since it uses less digits than its factorization.

71580016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4473759 (or 4473753 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 71580016 is about 8460.4973849059. The cubic root of 71580016 is about 415.2062960399.

The spelling of 71580016 in words is "seventy-one million, five hundred eighty thousand, sixteen".