16545723552478 has 4 divisors (see below), whose sum is σ = 24818585328720. Its totient is φ = 8272861776238.

The previous prime is 16545723552469. The next prime is 16545723552503. The reversal of 16545723552478 is 87425532754561.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4136430888118 + ... + 4136430888121.

It is an arithmetic number, because the mean of its divisors is an integer number (6204646332180).

Almost surely, 2^{16545723552478} is an apocalyptic number.

16545723552478 is a deficient number, since it is larger than the sum of its proper divisors (8272861776242).

16545723552478 is an equidigital number, since it uses as much as digits as its factorization.

16545723552478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8272861776241.

The product of its digits is 282240000, while the sum is 64.

The spelling of 16545723552478 in words is "sixteen trillion, five hundred forty-five billion, seven hundred twenty-three million, five hundred fifty-two thousand, four hundred seventy-eight".