21464163161 has 8 divisors (see below), whose sum is σ = 25973441280. Its totient is φ = 17315627328.

The previous prime is 21464163139. The next prime is 21464163173. The reversal of 21464163161 is 16136146412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21464163161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21464160161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90185441 + ... + 90185678.

It is an arithmetic number, because the mean of its divisors is an integer number (3246680160).

Almost surely, 2^21464163161 is an apocalyptic number.

It is an amenable number.

21464163161 is a deficient number, since it is larger than the sum of its proper divisors (4509278119).

21464163161 is a wasteful number, since it uses less digits than its factorization.

21464163161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180371143.

The product of its digits is 20736, while the sum is 35.

The spelling of 21464163161 in words is "twenty-one billion, four hundred sixty-four million, one hundred sixty-three thousand, one hundred sixty-one".