16545661607641 has 16 divisors (see below), whose sum is σ = 17424034666240. Its totient is φ = 15668045038800.

The previous prime is 16545661607639. The next prime is 16545661607647. The reversal of 16545661607641 is 14670616654561.

16545661607641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 16545661607641 - 2¹ = 16545661607639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16545661607647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 477477166 + ... + 477511816.

It is an arithmetic number, because the mean of its divisors is an integer number (1089002166640).

Almost surely, 2^{16545661607641} is an apocalyptic number.

It is an amenable number.

16545661607641 is a deficient number, since it is larger than the sum of its proper divisors (878373058599).

16545661607641 is a wasteful number, since it uses less digits than its factorization.

16545661607641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44836.

The product of its (nonzero) digits is 21772800, while the sum is 58.

The spelling of 16545661607641 in words is "sixteen trillion, five hundred forty-five billion, six hundred sixty-one million, six hundred seven thousand, six hundred forty-one".