21764371303161 has 16 divisors (see below), whose sum is σ = 32243657204800. Its totient is φ = 14509515995424.

The previous prime is 21764371303159. The next prime is 21764371303183. The reversal of 21764371303161 is 16130317346712.

21764371303161 is a `hidden beast` number, since 2 + 1 + 76 + 437 + 130 + 3 + 16 + 1 = 666.

It is not a de Polignac number, because 21764371303161 - 2¹ = 21764371303159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21764371308161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4786605 + ... + 8151093.

It is an arithmetic number, because the mean of its divisors is an integer number (2015228575300).

Almost surely, 2^{21764371303161} is an apocalyptic number.

It is an amenable number.

21764371303161 is a deficient number, since it is larger than the sum of its proper divisors (10479285901639).

21764371303161 is a wasteful number, since it uses less digits than its factorization.

21764371303161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3604085 (or 3604079 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

Adding to 21764371303161 its reverse (16130317346712), we get a palindrome (37894688649873).

The spelling of 21764371303161 in words is "twenty-one trillion, seven hundred sixty-four billion, three hundred seventy-one million, three hundred three thousand, one hundred sixty-one".