618849688900 has 81 divisors (see below), whose sum is σ = 1358566091127. Its totient is φ = 244685836800.

The previous prime is 618849688889. The next prime is 618849688901. The reversal of 618849688900 is 9886948816.

The square root of 618849688900 is 786670.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 22754515716 + 596095173184 = 150846^2 + 772072^2 .

It is not an unprimeable number, because it can be changed into a prime (618849688901) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 763069495 + ... + 763070305.

Almost surely, 2^618849688900 is an apocalyptic number.

618849688900 is the 786670-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618849688900

618849688900 is an abundant number, since it is smaller than the sum of its proper divisors (739716402227).

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

618849688900 is an frugal number, since it uses more digits than its factorization.

618849688900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830 (or 915 counting only the distinct ones).

The product of its (nonzero) digits is 47775744, while the sum is 67.

The spelling of 618849688900 in words is "six hundred eighteen billion, eight hundred forty-nine million, six hundred eighty-eight thousand, nine hundred".