71645853 has 8 divisors (see below), whose sum is σ = 95568928. Its totient is φ = 47743344.

The previous prime is 71645843. The next prime is 71645881. The reversal of 71645853 is 35854617.

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

It is not a de Polignac number, because 71645853 - 2⁸ = 71645597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71645843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7275 + ... + 14007.

It is an arithmetic number, because the mean of its divisors is an integer number (11946116).

Almost surely, 2^71645853 is an apocalyptic number.

It is an amenable number.

71645853 is a deficient number, since it is larger than the sum of its proper divisors (23923075).

71645853 is a wasteful number, since it uses less digits than its factorization.

71645853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10283.

The product of its digits is 100800, while the sum is 39.

The square root of 71645853 is about 8464.3873375455. The cubic root of 71645853 is about 415.3335548375. Note that the first 3 decimals are identical.

The spelling of 71645853 in words is "seventy-one million, six hundred forty-five thousand, eight hundred fifty-three".