618000000820 has 48 divisors (see below), whose sum is σ = 1306078013520. Its totient is φ = 245624938496.

The previous prime is 618000000817. The next prime is 618000000833. The reversal of 618000000820 is 28000000816.

It can be written as a sum of positive squares in 8 ways, for example, as 31375745424 + 586624255396 = 177132^2 + 765914^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5860884 + ... + 5965396.

It is an arithmetic number, because the mean of its divisors is an integer number (27209958615).

Almost surely, 2^618000000820 is an apocalyptic number.

It is an amenable number.

618000000820 is an abundant number, since it is smaller than the sum of its proper divisors (688078012700).

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

618000000820 is a wasteful number, since it uses less digits than its factorization.

618000000820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106404 (or 106402 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The spelling of 618000000820 in words is "six hundred eighteen billion, eight hundred twenty", and thus it is an aban number.