616857444669 has 4 divisors (see below), whose sum is σ = 822476592896. Its totient is φ = 411238296444.

The previous prime is 616857444661. The next prime is 616857444703. The reversal of 616857444669 is 966444758616.

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 not a de Polignac number, because 616857444669 - 2³ = 616857444661 is a prime.

It is a super-2 number, since 2×616857444669² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616857444661) 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, 102809574109 + ... + 102809574114.

It is an arithmetic number, because the mean of its divisors is an integer number (205619148224).

Almost surely, 2^616857444669 is an apocalyptic number.

It is an amenable number.

616857444669 is a deficient number, since it is larger than the sum of its proper divisors (205619148227).

616857444669 is a wasteful number, since it uses less digits than its factorization.

616857444669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205619148226.

The product of its digits is 209018880, while the sum is 66.

The spelling of 616857444669 in words is "six hundred sixteen billion, eight hundred fifty-seven million, four hundred forty-four thousand, six hundred sixty-nine".