16687163837 has 2 divisors, whose sum is σ = 16687163838. Its totient is φ = 16687163836.

The previous prime is 16687163821. The next prime is 16687163893. The reversal of 16687163837 is 73836178661.

It is an a-pointer prime, because the next prime (16687163893) can be obtained adding 16687163837 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16308822436 + 378341401 = 127706^2 + 19451^2 .

It is a cyclic number.

It is not a de Polignac number, because 16687163837 - 2⁴ = 16687163821 is a prime.

It is a super-2 number, since 2×16687163837² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16687163237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8343581918 + 8343581919.

It is an arithmetic number, because the mean of its divisors is an integer number (8343581919).

Almost surely, 2^16687163837 is an apocalyptic number.

It is an amenable number.

16687163837 is a deficient number, since it is larger than the sum of its proper divisors (1).

16687163837 is an equidigital number, since it uses as much as digits as its factorization.

16687163837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6096384, while the sum is 56.

The spelling of 16687163837 in words is "sixteen billion, six hundred eighty-seven million, one hundred sixty-three thousand, eight hundred thirty-seven".