21163405628160 has 576 divisors, whose sum is σ = 75708799810560. Its totient is φ = 5597990092800.

The previous prime is 21163405628149. The next prime is 21163405628161. The reversal of 21163405628160 is 6182650436112.

21163405628160 is a `hidden beast` number, since 2 + 1 + 1 + 6 + 3 + 4 + 0 + 5 + 628 + 16 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (21163405628161) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4107004144 + ... + 4107009296.

It is an arithmetic number, because the mean of its divisors is an integer number (131438888560).

Almost surely, 2^{21163405628160} is an apocalyptic number.

21163405628160 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 21163405628160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37854399905280).

21163405628160 is an abundant number, since it is smaller than the sum of its proper divisors (54545394182400).

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

21163405628160 is a wasteful number, since it uses less digits than its factorization.

21163405628160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6121 (or 6101 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 21163405628160 in words is "twenty-one trillion, one hundred sixty-three billion, four hundred five million, six hundred twenty-eight thousand, one hundred sixty".