618865044623280 has 960 divisors, whose sum is σ = 2672079283980288. Its totient is φ = 129620580065280.

The previous prime is 618865044623257. The next prime is 618865044623291. The reversal of 618865044623280 is 82326440568816.

618865044623280 is a `hidden beast` number, since 6 + 1 + 8 + 8 + 6 + 504 + 46 + 2 + 3 + 2 + 80 = 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 191 ways as a sum of consecutive naturals, for example, 241081725 + ... + 243635235.

Almost surely, 2^{618865044623280} is an apocalyptic number.

618865044623280 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 618865044623280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1336039641990144).

618865044623280 is an abundant number, since it is smaller than the sum of its proper divisors (2053214239357008).

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

618865044623280 is a wasteful number, since it uses less digits than its factorization.

618865044623280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2553696 (or 2553678 counting only the distinct ones).

The product of its (nonzero) digits is 106168320, while the sum is 63.

The spelling of 618865044623280 in words is "six hundred eighteen trillion, eight hundred sixty-five billion, forty-four million, six hundred twenty-three thousand, two hundred eighty".