16164937309 has 2 divisors, whose sum is σ = 16164937310. Its totient is φ = 16164937308.

The previous prime is 16164937279. The next prime is 16164937343. The reversal of 16164937309 is 90373946161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16126460100 + 38477209 = 126990^2 + 6203^2 .

It is a cyclic number.

It is not a de Polignac number, because 16164937309 - 2⁷ = 16164937181 is a prime.

It is a super-2 number, since 2×16164937309² (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 (16164937609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8082468654 + 8082468655.

It is an arithmetic number, because the mean of its divisors is an integer number (8082468655).

Almost surely, 2^16164937309 is an apocalyptic number.

It is an amenable number.

16164937309 is a deficient number, since it is larger than the sum of its proper divisors (1).

16164937309 is an equidigital number, since it uses as much as digits as its factorization.

16164937309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 49.

The spelling of 16164937309 in words is "sixteen billion, one hundred sixty-four million, nine hundred thirty-seven thousand, three hundred nine".