16890609861 has 16 divisors (see below), whose sum is σ = 25270883520. Its totient is φ = 11148915600.

The previous prime is 16890609833. The next prime is 16890609907.

16890609861 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 16890609861 - 2⁷ = 16890609733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16890609798 and 16890609807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16890609661) 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, 3094195 + ... + 3099648.

It is an arithmetic number, because the mean of its divisors is an integer number (1579430220).

Almost surely, 2^16890609861 is an apocalyptic number.

It is an amenable number.

16890609861 is a deficient number, since it is larger than the sum of its proper divisors (8380273659).

16890609861 is a wasteful number, since it uses less digits than its factorization.

16890609861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6193953 (or 6193947 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The spelling of 16890609861 in words is "sixteen billion, eight hundred ninety million, six hundred nine thousand, eight hundred sixty-one".