71995816 has 16 divisors (see below), whose sum is σ = 142933140. Its totient is φ = 33880320.

The previous prime is 71995813. The next prime is 71995823. The reversal of 71995816 is 61859917.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 64866916 + 7128900 = 8054^2 + 2670^2 .

It is not an unprimeable number, because it can be changed into a prime (71995813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264555 + ... + 264826.

Almost surely, 2^71995816 is an apocalyptic number.

It is an amenable number.

71995816 is a deficient number, since it is larger than the sum of its proper divisors (70937324).

71995816 is a wasteful number, since it uses less digits than its factorization.

71995816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529404 (or 529400 counting only the distinct ones).

The product of its digits is 136080, while the sum is 46.

The square root of 71995816 is about 8485.0348260923. The cubic root of 71995816 is about 416.0087060555.

The spelling of 71995816 in words is "seventy-one million, nine hundred ninety-five thousand, eight hundred sixteen".