16556342339 has 2 divisors, whose sum is σ = 16556342340. Its totient is φ = 16556342338.

The previous prime is 16556342323. The next prime is 16556342377. The reversal of 16556342339 is 93324365561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16556342339 - 2⁴ = 16556342323 is a prime.

It is a super-2 number, since 2×16556342339² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 16556342293 and 16556342302.

It is not a weakly prime, because it can be changed into another prime (16556342399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8278171169 + 8278171170.

It is an arithmetic number, because the mean of its divisors is an integer number (8278171170).

Almost surely, 2^16556342339 is an apocalyptic number.

16556342339 is a deficient number, since it is larger than the sum of its proper divisors (1).

16556342339 is an equidigital number, since it uses as much as digits as its factorization.

16556342339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1749600, while the sum is 47.

The spelling of 16556342339 in words is "sixteen billion, five hundred fifty-six million, three hundred forty-two thousand, three hundred thirty-nine".