16397830645 has 12 divisors (see below), whose sum is σ = 22890033324. Its totient is φ = 11244226560.

The previous prime is 16397830621. The next prime is 16397830663. The reversal of 16397830645 is 54603879361.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9646579089 + 6751251556 = 98217^2 + 82166^2 .

It is not a de Polignac number, because 16397830645 - 2¹⁷ = 16397699573 is a prime.

It is a super-3 number, since 3×16397830645³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16397830592 and 16397830601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33464716 + ... + 33465205.

It is an arithmetic number, because the mean of its divisors is an integer number (1907502777).

Almost surely, 2^16397830645 is an apocalyptic number.

It is an amenable number.

16397830645 is a deficient number, since it is larger than the sum of its proper divisors (6492202679).

16397830645 is an equidigital number, since it uses as much as digits as its factorization.

16397830645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66929940 (or 66929933 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 16397830645 in words is "sixteen billion, three hundred ninety-seven million, eight hundred thirty thousand, six hundred forty-five".