16545655744507 has 4 divisors (see below), whose sum is σ = 17416479731080. Its totient is φ = 15674831757936.

The previous prime is 16545655744487. The next prime is 16545655744547. The reversal of 16545655744507 is 70544755654561.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16545655744507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16545655744547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435411993258 + ... + 435411993295.

It is an arithmetic number, because the mean of its divisors is an integer number (4354119932770).

Almost surely, 2^{16545655744507} is an apocalyptic number.

16545655744507 is a deficient number, since it is larger than the sum of its proper divisors (870823986573).

16545655744507 is an equidigital number, since it uses as much as digits as its factorization.

16545655744507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870823986572.

The product of its (nonzero) digits is 352800000, while the sum is 64.

The spelling of 16545655744507 in words is "sixteen trillion, five hundred forty-five billion, six hundred fifty-five million, seven hundred forty-four thousand, five hundred seven".