618798864 has 80 divisors (see below), whose sum is σ = 1631895552. Its totient is φ = 202011264.

The previous prime is 618798847. The next prime is 618798889. The reversal of 618798864 is 468897816.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 505357 + ... + 506579.

Almost surely, 2^618798864 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 618798864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (815947776).

618798864 is an abundant number, since it is smaller than the sum of its proper divisors (1013096688).

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

618798864 is a wasteful number, since it uses less digits than its factorization.

618798864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444 (or 1438 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 57.

The square root of 618798864 is about 24875.6681116307. The cubic root of 618798864 is about 852.1508913029.

The spelling of 618798864 in words is "six hundred eighteen million, seven hundred ninety-eight thousand, eight hundred sixty-four".