16838401672 has 16 divisors (see below), whose sum is σ = 33429180060. Its totient is φ = 7923953664.

The previous prime is 16838401667. The next prime is 16838401681. The reversal of 16838401672 is 27610483861.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13443474916 + 3394926756 = 115946^2 + 58266^2 .

It is a super-2 number, since 2×16838401672² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61905753 + ... + 61906024.

Almost surely, 2^16838401672 is an apocalyptic number.

It is an amenable number.

16838401672 is a deficient number, since it is larger than the sum of its proper divisors (16590778388).

16838401672 is a wasteful number, since it uses less digits than its factorization.

16838401672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123811800 (or 123811796 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 16838401672 in words is "sixteen billion, eight hundred thirty-eight million, four hundred one thousand, six hundred seventy-two".