617493397869 has 32 divisors (see below), whose sum is σ = 917586247680. Its totient is φ = 410412106800.

The previous prime is 617493397813. The next prime is 617493397883. The reversal of 617493397869 is 968793394716.

617493397869 is a `hidden beast` number, since 6 + 1 + 7 + 493 + 3 + 9 + 78 + 69 = 666.

It is not a de Polignac number, because 617493397869 - 2⁸ = 617493397613 is a prime.

It is a super-2 number, since 2×617493397869² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 617493397797 and 617493397806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617473397869) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16820404 + ... + 16857074.

It is an arithmetic number, because the mean of its divisors is an integer number (28674570240).

Almost surely, 2^617493397869 is an apocalyptic number.

It is an amenable number.

617493397869 is a deficient number, since it is larger than the sum of its proper divisors (300092849811).

617493397869 is a wasteful number, since it uses less digits than its factorization.

617493397869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38558 (or 38552 counting only the distinct ones).

The product of its digits is 370355328, while the sum is 72.

The spelling of 617493397869 in words is "six hundred seventeen billion, four hundred ninety-three million, three hundred ninety-seven thousand, eight hundred sixty-nine".