618872866560 has 864 divisors, whose sum is σ = 2450333366208. Its totient is φ = 148582563840.

The previous prime is 618872866541. The next prime is 618872866609. The reversal of 618872866560 is 65668278816.

618872866560 is a `hidden beast` number, since 6 + 1 + 8 + 8 + 7 + 2 + 8 + 66 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 165782454 + ... + 165786186.

Almost surely, 2^618872866560 is an apocalyptic number.

618872866560 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 618872866560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1225166683104).

618872866560 is an abundant number, since it is smaller than the sum of its proper divisors (1831460499648).

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

618872866560 is a wasteful number, since it uses less digits than its factorization.

618872866560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3823 (or 3797 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 63.

The spelling of 618872866560 in words is "six hundred eighteen billion, eight hundred seventy-two million, eight hundred sixty-six thousand, five hundred sixty".