618890388480 has 2640 divisors, whose sum is σ = 2945422470144. Its totient is φ = 120872632320.

The previous prime is 618890388437. The next prime is 618890388521. The reversal of 618890388480 is 84883098816.

618890388480 is a `hidden beast` number, since 61 + 8 + 8 + 90 + 3 + 8 + 8 + 480 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 19964206065 + ... + 19964206095.

Almost surely, 2^618890388480 is an apocalyptic number.

618890388480 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 618890388480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1472711235072).

618890388480 is an abundant number, since it is smaller than the sum of its proper divisors (2326532081664).

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

618890388480 is a wasteful number, since it uses less digits than its factorization.

618890388480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 21233664, while the sum is 63.

The spelling of 618890388480 in words is "six hundred eighteen billion, eight hundred ninety million, three hundred eighty-eight thousand, four hundred eighty".