16506146503 has 16 divisors (see below), whose sum is σ = 20649355776. Its totient is φ = 12818017440.

The previous prime is 16506146497. The next prime is 16506146519. The reversal of 16506146503 is 30564160561.

It is a cyclic number.

It is not a de Polignac number, because 16506146503 - 2⁵ = 16506146471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16506146303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343251 + ... + 388372.

It is an arithmetic number, because the mean of its divisors is an integer number (1290584736).

Almost surely, 2^16506146503 is an apocalyptic number.

16506146503 is a deficient number, since it is larger than the sum of its proper divisors (4143209273).

16506146503 is a wasteful number, since it uses less digits than its factorization.

16506146503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731934.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 16506146503 in words is "sixteen billion, five hundred six million, one hundred forty-six thousand, five hundred three".