618544317 has 4 divisors (see below), whose sum is σ = 824725760. Its totient is φ = 412362876.

The previous prime is 618544309. The next prime is 618544319. The reversal of 618544317 is 713445816.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 618544317 - 2³ = 618544309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618544319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103090717 + ... + 103090722.

It is an arithmetic number, because the mean of its divisors is an integer number (206181440).

Almost surely, 2^618544317 is an apocalyptic number.

It is an amenable number.

618544317 is a deficient number, since it is larger than the sum of its proper divisors (206181443).

618544317 is a wasteful number, since it uses less digits than its factorization.

618544317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206181442.

The product of its digits is 80640, while the sum is 39.

The square root of 618544317 is about 24870.5512001644. The cubic root of 618544317 is about 852.0340293116.

The spelling of 618544317 in words is "six hundred eighteen million, five hundred forty-four thousand, three hundred seventeen".