71616418 has 8 divisors (see below), whose sum is σ = 107696412. Its totient is φ = 35717616.

The previous prime is 71616407. The next prime is 71616421. The reversal of 71616418 is 81461617.

It can be written as a sum of positive squares in 2 ways, for example, as 70610409 + 1006009 = 8403^2 + 1003^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×71616418² = 10257822654301448, which contains 22 as substring.

It is an unprimeable number.

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, 44305 + ... + 45892.

Almost surely, 2^71616418 is an apocalyptic number.

71616418 is a deficient number, since it is larger than the sum of its proper divisors (36079994).

71616418 is a wasteful number, since it uses less digits than its factorization.

71616418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90596.

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

The square root of 71616418 is about 8462.6484034255. The cubic root of 71616418 is about 415.2766684662.

The spelling of 71616418 in words is "seventy-one million, six hundred sixteen thousand, four hundred eighteen".