616833439861 has 4 divisors (see below), whose sum is σ = 617553199692. Its totient is φ = 616113680032.

The previous prime is 616833439843. The next prime is 616833439879. The reversal of 616833439861 is 168934338616.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (616833439843) and next prime (616833439879).

It can be written as a sum of positive squares in 2 ways, for example, as 515832786225 + 101000653636 = 718215^2 + 317806^2 .

It is a cyclic number.

It is not a de Polignac number, because 616833439861 - 2⁹ = 616833439349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 616833439796 and 616833439805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616833439801) 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, 359878630 + ... + 359880343.

It is an arithmetic number, because the mean of its divisors is an integer number (154388299923).

Almost surely, 2^616833439861 is an apocalyptic number.

It is an amenable number.

616833439861 is a deficient number, since it is larger than the sum of its proper divisors (719759831).

616833439861 is an equidigital number, since it uses as much as digits as its factorization.

616833439861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719759830.

The product of its digits is 13436928, while the sum is 58.

The spelling of 616833439861 in words is "six hundred sixteen billion, eight hundred thirty-three million, four hundred thirty-nine thousand, eight hundred sixty-one".