618917622120 has 288 divisors, whose sum is σ = 2369511705600. Its totient is φ = 139675850496.

The previous prime is 618917622107. The next prime is 618917622121. The reversal of 618917622120 is 21226719816.

618917622120 is a `hidden beast` number, since 6 + 1 + 8 + 9 + 1 + 7 + 622 + 12 + 0 = 666.

It is a super-2 number, since 2×618917622120² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (618917622121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1171497 + ... + 1615623.

It is an arithmetic number, because the mean of its divisors is an integer number (8227471200).

Almost surely, 2^618917622120 is an apocalyptic number.

618917622120 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 618917622120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1184755852800).

618917622120 is an abundant number, since it is smaller than the sum of its proper divisors (1750594083480).

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

618917622120 is a wasteful number, since it uses less digits than its factorization.

618917622120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444237 (or 444223 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 618917622120 in words is "six hundred eighteen billion, nine hundred seventeen million, six hundred twenty-two thousand, one hundred twenty".