71610643 has 4 divisors (see below), whose sum is σ = 77119168. Its totient is φ = 66102120.

The previous prime is 71610631. The next prime is 71610653. The reversal of 71610643 is 34601617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34601617 = 113 ⋅306209.

It is a cyclic number.

It is not a de Polignac number, because 71610643 - 2⁵ = 71610611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71610653) 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, 2754243 + ... + 2754268.

It is an arithmetic number, because the mean of its divisors is an integer number (19279792).

Almost surely, 2^71610643 is an apocalyptic number.

71610643 is a deficient number, since it is larger than the sum of its proper divisors (5508525).

71610643 is a wasteful number, since it uses less digits than its factorization.

71610643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5508524.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 71610643 is about 8462.3071913043. The cubic root of 71610643 is about 415.2655058152.

The spelling of 71610643 in words is "seventy-one million, six hundred ten thousand, six hundred forty-three".