16503455959 has 4 divisors (see below), whose sum is σ = 17474247504. Its totient is φ = 15532664416.

The previous prime is 16503455953. The next prime is 16503455971. The reversal of 16503455959 is 95955430561.

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 16503455959 - 2²⁷ = 16369238231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16503455953) 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, 485395747 + ... + 485395780.

It is an arithmetic number, because the mean of its divisors is an integer number (4368561876).

Almost surely, 2^16503455959 is an apocalyptic number.

16503455959 is a deficient number, since it is larger than the sum of its proper divisors (970791545).

16503455959 is an equidigital number, since it uses as much as digits as its factorization.

16503455959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970791544.

The product of its (nonzero) digits is 3645000, while the sum is 52.

The spelling of 16503455959 in words is "sixteen billion, five hundred three million, four hundred fifty-five thousand, nine hundred fifty-nine".