21161060754480 has 240 divisors, whose sum is σ = 74271442055616. Its totient is φ = 5389180600320.

The previous prime is 21161060754467. The next prime is 21161060754481. The reversal of 21161060754480 is 8445706016112.

21161060754480 is a `hidden beast` number, since 2 + 1 + 1 + 61 + 0 + 60 + 7 + 54 + 480 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

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 (21161060754481) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9618204 + ... + 11611716.

Almost surely, 2^{21161060754480} is an apocalyptic number.

21161060754480 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 21161060754480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37135721027808).

21161060754480 is an abundant number, since it is smaller than the sum of its proper divisors (53110381301136).

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

21161060754480 is a wasteful number, since it uses less digits than its factorization.

21161060754480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994196 (or 1994187 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 21161060754480 in words is "twenty-one trillion, one hundred sixty-one billion, sixty million, seven hundred fifty-four thousand, four hundred eighty".