618823680 has 128 divisors (see below), whose sum is σ = 1981778400. Its totient is φ = 164888576.

The previous prime is 618823661. The next prime is 618823687. The reversal of 618823680 is 86328816.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618823687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490891 + ... + 492149.

Almost surely, 2^618823680 is an apocalyptic number.

618823680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618823680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (990889200).

618823680 is an abundant number, since it is smaller than the sum of its proper divisors (1362954720).

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

618823680 is an equidigital number, since it uses as much as digits as its factorization.

618823680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297 (or 1269 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 618823680 is about 24876.1669073031. The cubic root of 618823680 is about 852.1622825616.

The spelling of 618823680 in words is "six hundred eighteen million, eight hundred twenty-three thousand, six hundred eighty".