618663450 has 48 divisors (see below), whose sum is σ = 1540794240. Its totient is φ = 164277120.

The previous prime is 618663431. The next prime is 618663469. The reversal of 618663450 is 54366816.

It is an interprime number because it is at equal distance from previous prime (618663431) and next prime (618663469).

It is a junction number, because it is equal to n+sod(n) for n = 618663399 and 618663408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27222 + ... + 44478.

It is an arithmetic number, because the mean of its divisors is an integer number (32099880).

Almost surely, 2^618663450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618663450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (770397120).

618663450 is an abundant number, since it is smaller than the sum of its proper divisors (922130790).

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

618663450 is a wasteful number, since it uses less digits than its factorization.

618663450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17511 (or 17506 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 618663450 is about 24872.9461463655. The cubic root of 618663450 is about 852.0887270113.

The spelling of 618663450 in words is "six hundred eighteen million, six hundred sixty-three thousand, four hundred fifty".