16545723552499 has 4 divisors (see below), whose sum is σ = 16692145884936. Its totient is φ = 16399301220064.

The previous prime is 16545723552469. The next prime is 16545723552503. The reversal of 16545723552499 is 99425532754561.

It is a happy number.

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 16545723552499 - 2³⁷ = 16408284599027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16545723552469) 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, 73211166049 + ... + 73211166274.

It is an arithmetic number, because the mean of its divisors is an integer number (4173036471234).

Almost surely, 2^{16545723552499} is an apocalyptic number.

16545723552499 is a deficient number, since it is larger than the sum of its proper divisors (146422332437).

16545723552499 is a wasteful number, since it uses less digits than its factorization.

16545723552499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146422332436.

The product of its digits is 408240000, while the sum is 67.

The spelling of 16545723552499 in words is "sixteen trillion, five hundred forty-five billion, seven hundred twenty-three million, five hundred fifty-two thousand, four hundred ninety-nine".