16545661607572 has 12 divisors (see below), whose sum is σ = 28954936483200. Its totient is φ = 8272822612376.

The previous prime is 16545661607561. The next prime is 16545661607593. The reversal of 16545661607572 is 27570616654561.

It is a self number, because there is not a number n which added to its sum of digits gives 16545661607572.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6090429 + ... + 8377627.

It is an arithmetic number, because the mean of its divisors is an integer number (2412911373600).

Almost surely, 2^{16545661607572} is an apocalyptic number.

It is an amenable number.

16545661607572 is a deficient number, since it is larger than the sum of its proper divisors (12409274875628).

16545661607572 is a wasteful number, since it uses less digits than its factorization.

16545661607572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4095710 (or 4095708 counting only the distinct ones).

The product of its (nonzero) digits is 63504000, while the sum is 61.

The spelling of 16545661607572 in words is "sixteen trillion, five hundred forty-five billion, six hundred sixty-one million, six hundred seven thousand, five hundred seventy-two".