2163559381980 has 768 divisors, whose sum is σ = 7073198899200. Its totient is φ = 490714398720.

The previous prime is 2163559381903. The next prime is 2163559382003. The reversal of 2163559381980 is 891839553612.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 7699499440 + ... + 7699499720.

It is an arithmetic number, because the mean of its divisors is an integer number (9209894400).

Almost surely, 2^{2163559381980} is an apocalyptic number.

2163559381980 is a gapful number since it is divisible by the number (20) 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 2163559381980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3536599449600).

2163559381980 is an abundant number, since it is smaller than the sum of its proper divisors (4909639517220).

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

2163559381980 is a wasteful number, since it uses less digits than its factorization.

2163559381980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 60.

The spelling of 2163559381980 in words is "two trillion, one hundred sixty-three billion, five hundred fifty-nine million, three hundred eighty-one thousand, nine hundred eighty".