617982078389 has 16 divisors (see below), whose sum is σ = 690036547200. Its totient is φ = 549519719616.

The previous prime is 617982078361. The next prime is 617982078397. The reversal of 617982078389 is 983870289716.

It is a cyclic number.

It is not a de Polignac number, because 617982078389 - 2¹² = 617982074293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617982078319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1701479 + ... + 2032484.

It is an arithmetic number, because the mean of its divisors is an integer number (43127284200).

Almost surely, 2^617982078389 is an apocalyptic number.

It is an amenable number.

617982078389 is a deficient number, since it is larger than the sum of its proper divisors (72054468811).

617982078389 is a wasteful number, since it uses less digits than its factorization.

617982078389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3734444.

The product of its (nonzero) digits is 73156608, while the sum is 68.

The spelling of 617982078389 in words is "six hundred seventeen billion, nine hundred eighty-two million, seventy-eight thousand, three hundred eighty-nine".