16506939575 has 24 divisors (see below), whose sum is σ = 24409771008. Its totient is φ = 10826909280.

The previous prime is 16506939563. The next prime is 16506939593. The reversal of 16506939575 is 57593960561.

It is a happy number.

It is not a de Polignac number, because 16506939575 - 2¹⁰ = 16506938551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16506939575.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2046527 + ... + 2054576.

It is an arithmetic number, because the mean of its divisors is an integer number (1017073792).

Almost surely, 2^16506939575 is an apocalyptic number.

16506939575 is a deficient number, since it is larger than the sum of its proper divisors (7902831433).

16506939575 is a wasteful number, since it uses less digits than its factorization.

16506939575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4101143 (or 4101138 counting only the distinct ones).

The product of its (nonzero) digits is 7654500, while the sum is 56.

The spelling of 16506939575 in words is "sixteen billion, five hundred six million, nine hundred thirty-nine thousand, five hundred seventy-five".