618404864 has 264 divisors, whose sum is σ = 1672710144. Its totient is φ = 223027200.

The previous prime is 618404861. The next prime is 618405017. The reversal of 618404864 is 468404816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618404861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19948529 + ... + 19948559.

Almost surely, 2^618404864 is an apocalyptic number.

618404864 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618404864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (836355072).

618404864 is an abundant number, since it is smaller than the sum of its proper divisors (1054305280).

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

618404864 is a wasteful number, since it uses less digits than its factorization.

618404864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 41.

The square root of 618404864 is about 24867.7474653415. The cubic root of 618404864 is about 851.9699931389.

The spelling of 618404864 in words is "six hundred eighteen million, four hundred four thousand, eight hundred sixty-four".