16506056603 has 4 divisors (see below), whose sum is σ = 16669483008. Its totient is φ = 16342630200.

The previous prime is 16506056573. The next prime is 16506056617. The reversal of 16506056603 is 30665060561.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16506056603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16506056663) 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, 81713051 + ... + 81713252.

It is an arithmetic number, because the mean of its divisors is an integer number (4167370752).

Almost surely, 2^16506056603 is an apocalyptic number.

16506056603 is a deficient number, since it is larger than the sum of its proper divisors (163426405).

16506056603 is a wasteful number, since it uses less digits than its factorization.

16506056603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163426404.

The product of its (nonzero) digits is 97200, while the sum is 38.

The spelling of 16506056603 in words is "sixteen billion, five hundred six million, fifty-six thousand, six hundred three".