71913616 has 20 divisors (see below), whose sum is σ = 140715324. Its totient is φ = 35600000.

The previous prime is 71913593. The next prime is 71913637. The reversal of 71913616 is 61631917.

It can be written as a sum of positive squares in 2 ways, for example, as 58982400 + 12931216 = 7680^2 + 3596^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20635 + ... + 23866.

Almost surely, 2^71913616 is an apocalyptic number.

It is an amenable number.

71913616 is a deficient number, since it is larger than the sum of its proper divisors (68801708).

71913616 is a wasteful number, since it uses less digits than its factorization.

71913616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44610 (or 44604 counting only the distinct ones).

The product of its digits is 6804, while the sum is 34.

The square root of 71913616 is about 8480.1896205215. The cubic root of 71913616 is about 415.8503221382.

The spelling of 71913616 in words is "seventy-one million, nine hundred thirteen thousand, six hundred sixteen".