16994875501 has 4 divisors (see below), whose sum is σ = 17150791900. Its totient is φ = 16838959104.

The previous prime is 16994875493. The next prime is 16994875507. The reversal of 16994875501 is 10557849961.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6854184100 + 10140691401 = 82790^2 + 100701^2 .

It is a cyclic number.

It is not a de Polignac number, because 16994875501 - 2³ = 16994875493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16994875507) 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, 77958036 + ... + 77958253.

It is an arithmetic number, because the mean of its divisors is an integer number (4287697975).

Almost surely, 2^16994875501 is an apocalyptic number.

It is an amenable number.

16994875501 is a deficient number, since it is larger than the sum of its proper divisors (155916399).

16994875501 is a wasteful number, since it uses less digits than its factorization.

16994875501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155916398.

The product of its (nonzero) digits is 2721600, while the sum is 55.

The spelling of 16994875501 in words is "sixteen billion, nine hundred ninety-four million, eight hundred seventy-five thousand, five hundred one".