618988139352 has 144 divisors (see below), whose sum is σ = 1834003739880. Its totient is φ = 187042867200.

The previous prime is 618988139303. The next prime is 618988139353. The reversal of 618988139352 is 253931889816.

618988139352 is a `hidden beast` number, since 61 + 8 + 98 + 8 + 139 + 352 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 618988139352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618988139353) 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 35 ways as a sum of consecutive naturals, for example, 113760952 + ... + 113766392.

Almost surely, 2^618988139352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618988139352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (917001869940).

618988139352 is an abundant number, since it is smaller than the sum of its proper divisors (1215015600528).

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

618988139352 is a wasteful number, since it uses less digits than its factorization.

618988139352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6222 (or 5836 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 63.

The spelling of 618988139352 in words is "six hundred eighteen billion, nine hundred eighty-eight million, one hundred thirty-nine thousand, three hundred fifty-two".