918081648 has 160 divisors (see below), whose sum is σ = 2942311680. Its totient is φ = 271676160.

The previous prime is 918081643. The next prime is 918081649. The reversal of 918081648 is 846180819.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918081643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202090 + ... + 206582.

It is an arithmetic number, because the mean of its divisors is an integer number (18389448).

Almost surely, 2^918081648 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 918081648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1471155840).

918081648 is an abundant number, since it is smaller than the sum of its proper divisors (2024230032).

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

918081648 is a wasteful number, since it uses less digits than its factorization.

918081648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4564 (or 4552 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 918081648 is about 30299.8621779044. The cubic root of 918081648 is about 971.9123530175.

The spelling of 918081648 in words is "nine hundred eighteen million, eighty-one thousand, six hundred forty-eight".