616678948169 has 4 divisors (see below), whose sum is σ = 617614728720. Its totient is φ = 615743167620.

The previous prime is 616678948153. The next prime is 616678948177. The reversal of 616678948169 is 961849876616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 616678948169 - 2⁴ = 616678948153 is a prime.

It is a super-2 number, since 2×616678948169² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (616678948139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467889287 + ... + 467890604.

It is an arithmetic number, because the mean of its divisors is an integer number (154403682180).

Almost surely, 2^616678948169 is an apocalyptic number.

It is an amenable number.

616678948169 is a deficient number, since it is larger than the sum of its proper divisors (935780551).

616678948169 is an equidigital number, since it uses as much as digits as its factorization.

616678948169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935780550.

The product of its digits is 188116992, while the sum is 71.

The spelling of 616678948169 in words is "six hundred sixteen billion, six hundred seventy-eight million, nine hundred forty-eight thousand, one hundred sixty-nine".