71064815 has 4 divisors (see below), whose sum is σ = 85277784. Its totient is φ = 56851848.

The previous prime is 71064787. The next prime is 71064821. The reversal of 71064815 is 51846017.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51846017 = 41 ⋅1264537.

It is a cyclic number.

It is not a de Polignac number, because 71064815 - 2⁶ = 71064751 is a prime.

It is a Duffinian number.

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, 7106477 + ... + 7106486.

It is an arithmetic number, because the mean of its divisors is an integer number (21319446).

Almost surely, 2^71064815 is an apocalyptic number.

71064815 is a deficient number, since it is larger than the sum of its proper divisors (14212969).

71064815 is a wasteful number, since it uses less digits than its factorization.

71064815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14212968.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 71064815 is about 8429.9949584801. The cubic root of 71064815 is about 414.2077399539.

The spelling of 71064815 in words is "seventy-one million, sixty-four thousand, eight hundred fifteen".