16605605629 has 2 divisors, whose sum is σ = 16605605630. Its totient is φ = 16605605628.

The previous prime is 16605605563. The next prime is 16605605701. The reversal of 16605605629 is 92650650661.

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., 15975696025 + 629909604 = 126395^2 + 25098^2 .

It is a cyclic number.

It is not a de Polignac number, because 16605605629 - 2²¹ = 16603508477 is a prime.

It is a super-2 number, since 2×16605605629² (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 (16605603629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8302802814 + 8302802815.

It is an arithmetic number, because the mean of its divisors is an integer number (8302802815).

Almost surely, 2^16605605629 is an apocalyptic number.

It is an amenable number.

16605605629 is a deficient number, since it is larger than the sum of its proper divisors (1).

16605605629 is an equidigital number, since it uses as much as digits as its factorization.

16605605629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 583200, while the sum is 46.

The spelling of 16605605629 in words is "sixteen billion, six hundred five million, six hundred five thousand, six hundred twenty-nine".