71516642 has 4 divisors (see below), whose sum is σ = 107274966. Its totient is φ = 35758320.

The previous prime is 71516623. The next prime is 71516651. The reversal of 71516642 is 24661517.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 43943641 + 27573001 = 6629^2 + 5251^2 .

It is a super-2 number, since 2×71516642² = 10229260165912328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71516599 and 71516608.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17879159 + ... + 17879162.

Almost surely, 2^71516642 is an apocalyptic number.

71516642 is a deficient number, since it is larger than the sum of its proper divisors (35758324).

71516642 is a wasteful number, since it uses less digits than its factorization.

71516642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35758323.

The product of its digits is 10080, while the sum is 32.

The square root of 71516642 is about 8456.7512674785. The cubic root of 71516642 is about 415.0837243378.

The spelling of 71516642 in words is "seventy-one million, five hundred sixteen thousand, six hundred forty-two".