618668478 has 12 divisors (see below), whose sum is σ = 1340448408. Its totient is φ = 206222820.

The previous prime is 618668441. The next prime is 618668483. The reversal of 618668478 is 874866816.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 17185218 + ... + 17185253.

It is an arithmetic number, because the mean of its divisors is an integer number (111704034).

Almost surely, 2^618668478 is an apocalyptic number.

618668478 is an abundant number, since it is smaller than the sum of its proper divisors (721779930).

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

618668478 is a wasteful number, since it uses less digits than its factorization.

618668478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34370479 (or 34370476 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The square root of 618668478 is about 24873.0472198322. The cubic root of 618668478 is about 852.0910353695.

The spelling of 618668478 in words is "six hundred eighteen million, six hundred sixty-eight thousand, four hundred seventy-eight".