618544312 has 8 divisors (see below), whose sum is σ = 1159770600. Its totient is φ = 309272152.

The previous prime is 618544309. The next prime is 618544319. The reversal of 618544312 is 213445816.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×618544312³ (a number of 27 digits) contains 333 as substring.

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 as a sum of consecutive naturals, namely, 38659012 + ... + 38659027.

It is an arithmetic number, because the mean of its divisors is an integer number (144971325).

Almost surely, 2^618544312 is an apocalyptic number.

It is an amenable number.

618544312 is a deficient number, since it is larger than the sum of its proper divisors (541226288).

618544312 is a wasteful number, since it uses less digits than its factorization.

618544312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77318045 (or 77318041 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 618544312 is about 24870.5510996439. The cubic root of 618544312 is about 852.0340270158.

It can be divided in two parts, 61854 and 4312, that added together give a palindrome (66166).

The spelling of 618544312 in words is "six hundred eighteen million, five hundred forty-four thousand, three hundred twelve".