16545655721067 has 16 divisors (see below), whose sum is σ = 24066622150272. Its totient is φ = 10027581038720.

The previous prime is 16545655721047. The next prime is 16545655721071. The reversal of 16545655721067 is 76012755654561.

It is a cyclic number.

It is not a de Polignac number, because 16545655721067 - 2¹⁵ = 16545655688299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16545655721067.

It is not an unprimeable number, because it can be changed into a prime (16545655721047) 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, 1643443 + ... + 5982659.

It is an arithmetic number, because the mean of its divisors is an integer number (1504163884392).

Almost surely, 2^{16545655721067} is an apocalyptic number.

16545655721067 is a deficient number, since it is larger than the sum of its proper divisors (7520966429205).

16545655721067 is a wasteful number, since it uses less digits than its factorization.

16545655721067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4454778.

The product of its (nonzero) digits is 52920000, while the sum is 60.

The spelling of 16545655721067 in words is "sixteen trillion, five hundred forty-five billion, six hundred fifty-five million, seven hundred twenty-one thousand, sixty-seven".