71220715685 has 8 divisors (see below), whose sum is σ = 97674124416. Its totient is φ = 48837062160.

The previous prime is 71220715679. The next prime is 71220715691. The reversal of 71220715685 is 58651702217.

It is an interprime number because it is at equal distance from previous prime (71220715679) and next prime (71220715691).

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

It is not a de Polignac number, because 71220715685 - 2³⁰ = 70146973861 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 7 ways as a sum of consecutive naturals, for example, 1017438761 + ... + 1017438830.

It is an arithmetic number, because the mean of its divisors is an integer number (12209265552).

Almost surely, 2^71220715685 is an apocalyptic number.

It is an amenable number.

71220715685 is a deficient number, since it is larger than the sum of its proper divisors (26453408731).

71220715685 is a wasteful number, since it uses less digits than its factorization.

71220715685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034877603.

The product of its (nonzero) digits is 235200, while the sum is 44.

The spelling of 71220715685 in words is "seventy-one billion, two hundred twenty million, seven hundred fifteen thousand, six hundred eighty-five".