16545651600623 has 4 divisors (see below), whose sum is σ = 16553372392128. Its totient is φ = 16537930809120.

The previous prime is 16545651600619. The next prime is 16545651600629. The reversal of 16545651600623 is 32600615654561.

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

It is a cyclic number.

It is not a de Polignac number, because 16545651600623 - 2² = 16545651600619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16545651600629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3860392538 + ... + 3860396823.

It is an arithmetic number, because the mean of its divisors is an integer number (4138343098032).

Almost surely, 2^{16545651600623} is an apocalyptic number.

16545651600623 is a deficient number, since it is larger than the sum of its proper divisors (7720791505).

16545651600623 is an equidigital number, since it uses as much as digits as its factorization.

16545651600623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7720791504.

The product of its (nonzero) digits is 3888000, while the sum is 50.

The spelling of 16545651600623 in words is "sixteen trillion, five hundred forty-five billion, six hundred fifty-one million, six hundred thousand, six hundred twenty-three".