1618344798 has 64 divisors (see below), whose sum is σ = 3904919040. Its totient is φ = 436793472.

The previous prime is 1618344751. The next prime is 1618344821. The reversal of 1618344798 is 8974438161.

It is a self number, because there is not a number n which added to its sum of digits gives 1618344798.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 294936 + ... + 300372.

It is an arithmetic number, because the mean of its divisors is an integer number (61014360).

Almost surely, 2^1618344798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1618344798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1952459520).

1618344798 is an abundant number, since it is smaller than the sum of its proper divisors (2286574242).

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

1618344798 is a wasteful number, since it uses less digits than its factorization.

1618344798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5841.

The product of its digits is 1161216, while the sum is 51.

The square root of 1618344798 is about 40228.6564279743. The cubic root of 1618344798 is about 1174.0601624183.

The spelling of 1618344798 in words is "one billion, six hundred eighteen million, three hundred forty-four thousand, seven hundred ninety-eight".