16851400738 has 16 divisors (see below), whose sum is σ = 25629755256. Its totient is φ = 8308206720.

The previous prime is 16851400729. The next prime is 16851400759. The reversal of 16851400738 is 83700415861.

It can be written as a sum of positive squares in 4 ways, for example, as 11215445409 + 5635955329 = 105903^2 + 75073^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16851400694 and 16851400703.

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 7 ways as a sum of consecutive naturals, for example, 690708 + ... + 714688.

Almost surely, 2^16851400738 is an apocalyptic number.

16851400738 is a deficient number, since it is larger than the sum of its proper divisors (8778354518).

16851400738 is a wasteful number, since it uses less digits than its factorization.

16851400738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28869.

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 16851400738 in words is "sixteen billion, eight hundred fifty-one million, four hundred thousand, seven hundred thirty-eight".