16990209967 has 4 divisors (see below), whose sum is σ = 16990475320. Its totient is φ = 16989944616.

The previous prime is 16990209937. The next prime is 16990209979. The reversal of 16990209967 is 76990209961.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16990209967 - 2²⁷ = 16855992239 is a prime.

It is a super-2 number, since 2×16990209967² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16990209937) 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, 29209 + ... + 186637.

It is an arithmetic number, because the mean of its divisors is an integer number (4247618830).

Almost surely, 2^16990209967 is an apocalyptic number.

16990209967 is a deficient number, since it is larger than the sum of its proper divisors (265353).

16990209967 is a wasteful number, since it uses less digits than its factorization.

16990209967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265352.

The product of its (nonzero) digits is 3306744, while the sum is 58.

The spelling of 16990209967 in words is "sixteen billion, nine hundred ninety million, two hundred nine thousand, nine hundred sixty-seven".