994339735565 has 12 divisors (see below), whose sum is σ = 1311542329692. Its totient is φ = 723156170880.

The previous prime is 994339735561. The next prime is 994339735619. The reversal of 994339735565 is 565537933499.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 341609856676 + 652729878889 = 584474^2 + 807917^2 .

It is not a de Polignac number, because 994339735565 - 2² = 994339735561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 994339735495 and 994339735504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994339735561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 821767772 + ... + 821768981.

It is an arithmetic number, because the mean of its divisors is an integer number (109295194141).

Almost surely, 2^994339735565 is an apocalyptic number.

It is an amenable number.

994339735565 is a deficient number, since it is larger than the sum of its proper divisors (317202594127).

994339735565 is a wasteful number, since it uses less digits than its factorization.

994339735565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643536780 (or 1643536769 counting only the distinct ones).

The product of its digits is 413343000, while the sum is 68.

The spelling of 994339735565 in words is "nine hundred ninety-four billion, three hundred thirty-nine million, seven hundred thirty-five thousand, five hundred sixty-five".