16620624269 has 2 divisors, whose sum is σ = 16620624270. Its totient is φ = 16620624268.

The previous prime is 16620624221. The next prime is 16620624283. The reversal of 16620624269 is 96242602661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13308621769 + 3312002500 = 115363^2 + 57550^2 .

It is an emirp because it is prime and its reverse (96242602661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16620624269 is a prime.

It is a super-2 number, since 2×16620624269² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16620624299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8310312134 + 8310312135.

It is an arithmetic number, because the mean of its divisors is an integer number (8310312135).

Almost surely, 2^16620624269 is an apocalyptic number.

It is an amenable number.

16620624269 is a deficient number, since it is larger than the sum of its proper divisors (1).

16620624269 is an equidigital number, since it uses as much as digits as its factorization.

16620624269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 44.

The spelling of 16620624269 in words is "sixteen billion, six hundred twenty million, six hundred twenty-four thousand, two hundred sixty-nine".