618788104920 has 320 divisors, whose sum is σ = 2140350220800. Its totient is φ = 160261320960.

The previous prime is 618788104903. The next prime is 618788105059. The reversal of 618788104920 is 29401887816.

618788104920 is a `hidden beast` number, since 6 + 1 + 8 + 78 + 81 + 0 + 492 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 19933171 + ... + 19964189.

It is an arithmetic number, because the mean of its divisors is an integer number (6688594440).

Almost surely, 2^618788104920 is an apocalyptic number.

618788104920 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 618788104920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1070175110400).

618788104920 is an abundant number, since it is smaller than the sum of its proper divisors (1521562115880).

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

618788104920 is a wasteful number, since it uses less digits than its factorization.

618788104920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31220 (or 31207 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The spelling of 618788104920 in words is "six hundred eighteen billion, seven hundred eighty-eight million, one hundred four thousand, nine hundred twenty".