16844562989 has 8 divisors (see below), whose sum is σ = 17299911552. Its totient is φ = 16392106080.

The previous prime is 16844562967. The next prime is 16844562991. The reversal of 16844562989 is 98926544861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16844562989 - 2¹² = 16844558893 is a prime.

It is a super-2 number, since 2×16844562989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16844562949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 711104 + ... + 734409.

It is an arithmetic number, because the mean of its divisors is an integer number (2162488944).

Almost surely, 2^16844562989 is an apocalyptic number.

It is an amenable number.

16844562989 is a deficient number, since it is larger than the sum of its proper divisors (455348563).

16844562989 is a wasteful number, since it uses less digits than its factorization.

16844562989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445827.

The product of its digits is 29859840, while the sum is 62.

The spelling of 16844562989 in words is "sixteen billion, eight hundred forty-four million, five hundred sixty-two thousand, nine hundred eighty-nine".