618545816 has 96 divisors (see below), whose sum is σ = 1444197600. Its totient is φ = 246758400.

The previous prime is 618545791. The next prime is 618545819.

618545816 = 6024² + 6025² + ... + 6040².

618545816 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×618545816² = 765197852982211712, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618545819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 672605 + ... + 673523.

It is an arithmetic number, because the mean of its divisors is an integer number (15043725).

Almost surely, 2^618545816 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 618545816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (722098800).

618545816 is an abundant number, since it is smaller than the sum of its proper divisors (825651784).

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

618545816 is a wasteful number, since it uses less digits than its factorization.

618545816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057 (or 1046 counting only the distinct ones).

The product of its digits is 230400, while the sum is 44.

The square root of 618545816 is about 24870.5813361891. The cubic root of 618545816 is about 852.0347175931.

The spelling of 618545816 in words is "six hundred eighteen million, five hundred forty-five thousand, eight hundred sixteen".