617859746812 has 108 divisors (see below), whose sum is σ = 1410223707144. Its totient is φ = 234217388160.

The previous prime is 617859746771. The next prime is 617859746831. The reversal of 617859746812 is 218647958716.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2846898 + ... + 3056230.

It is an arithmetic number, because the mean of its divisors is an integer number (13057626918).

Almost surely, 2^617859746812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 617859746812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (705111853572).

617859746812 is an abundant number, since it is smaller than the sum of its proper divisors (792363960332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

617859746812 is a wasteful number, since it uses less digits than its factorization.

617859746812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209436 (or 209390 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 64.

The spelling of 617859746812 in words is "six hundred seventeen billion, eight hundred fifty-nine million, seven hundred forty-six thousand, eight hundred twelve".