16823725861 has 16 divisors (see below), whose sum is σ = 17956753920. Its totient is φ = 15706828800.

The previous prime is 16823725847. The next prime is 16823725873. The reversal of 16823725861 is 16852732861.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 16823725861 - 2¹⁵ = 16823693093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16823785861) 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, 3780940 + ... + 3785386.

It is an arithmetic number, because the mean of its divisors is an integer number (1122297120).

Almost surely, 2^16823725861 is an apocalyptic number.

It is an amenable number.

16823725861 is a deficient number, since it is larger than the sum of its proper divisors (1133028059).

16823725861 is a wasteful number, since it uses less digits than its factorization.

16823725861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6204.

The product of its digits is 967680, while the sum is 49.

The spelling of 16823725861 in words is "sixteen billion, eight hundred twenty-three million, seven hundred twenty-five thousand, eight hundred sixty-one".