618823535616 has 1848 divisors, whose sum is σ = 2399607245952. Its totient is φ = 157659955200.

The previous prime is 618823535597. The next prime is 618823535639. The reversal of 618823535616 is 616535328816.

It is a happy number.

618823535616 is a `hidden beast` number, since 6 + 1 + 8 + 8 + 23 + 53 + 561 + 6 = 666.

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

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 167 ways as a sum of consecutive naturals, for example, 19962049521 + ... + 19962049551.

Almost surely, 2^618823535616 is an apocalyptic number.

618823535616 is a gapful number since it is divisible by the number (66) 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 618823535616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1199803622976).

618823535616 is an abundant number, since it is smaller than the sum of its proper divisors (1780783710336).

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

618823535616 is a wasteful number, since it uses less digits than its factorization.

618823535616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121 (or 77 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The spelling of 618823535616 in words is "six hundred eighteen billion, eight hundred twenty-three million, five hundred thirty-five thousand, six hundred sixteen".