21161015460054 has 48 divisors (see below), whose sum is σ = 47106500772240. Its totient is φ = 6861210693120.

The previous prime is 21161015460043. The next prime is 21161015460059. The reversal of 21161015460054 is 45006451016112.

21161015460054 is a `hidden beast` number, since 2 + 1 + 1 + 6 + 101 + 546 + 0 + 0 + 5 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21161015460059) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42293524 + ... + 42790935.

It is an arithmetic number, because the mean of its divisors is an integer number (981385432755).

Almost surely, 2^{21161015460054} is an apocalyptic number.

21161015460054 is an abundant number, since it is smaller than the sum of its proper divisors (25945485312186).

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

21161015460054 is a wasteful number, since it uses less digits than its factorization.

21161015460054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85084845 (or 85084842 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

Adding to 21161015460054 its reverse (45006451016112), we get a palindrome (66167466476166).

The spelling of 21161015460054 in words is "twenty-one trillion, one hundred sixty-one billion, fifteen million, four hundred sixty thousand, fifty-four".