16575685397 has 4 divisors (see below), whose sum is σ = 16739801196. Its totient is φ = 16411569600.

The previous prime is 16575685387. The next prime is 16575685417. The reversal of 16575685397 is 79358657561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15945123076 + 630562321 = 126274^2 + 25111^2 .

It is a cyclic number.

It is not a de Polignac number, because 16575685397 - 2¹⁴ = 16575669013 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 (16575685307) 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, 82057748 + ... + 82057949.

It is an arithmetic number, because the mean of its divisors is an integer number (4184950299).

Almost surely, 2^16575685397 is an apocalyptic number.

It is an amenable number.

16575685397 is a deficient number, since it is larger than the sum of its proper divisors (164115799).

16575685397 is a wasteful number, since it uses less digits than its factorization.

16575685397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164115798.

The product of its digits is 47628000, while the sum is 62.

The spelling of 16575685397 in words is "sixteen billion, five hundred seventy-five million, six hundred eighty-five thousand, three hundred ninety-seven".