71600028985 has 4 divisors (see below), whose sum is σ = 85920034788. Its totient is φ = 57280023184.

The previous prime is 71600028961. The next prime is 71600028989. The reversal of 71600028985 is 58982000617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58982000617 = 859 ⋅68663563.

It can be written as a sum of positive squares in 2 ways, for example, as 22869907984 + 48730121001 = 151228^2 + 220749^2 .

It is a cyclic number.

It is not a de Polignac number, because 71600028985 - 2²⁷ = 71465811257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71600028989) 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, 7160002894 + ... + 7160002903.

It is an arithmetic number, because the mean of its divisors is an integer number (21480008697).

Almost surely, 2^71600028985 is an apocalyptic number.

It is an amenable number.

71600028985 is a deficient number, since it is larger than the sum of its proper divisors (14320005803).

71600028985 is a wasteful number, since it uses less digits than its factorization.

71600028985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14320005802.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 71600028985 in words is "seventy-one billion, six hundred million, twenty-eight thousand, nine hundred eighty-five".