21911164617 has 8 divisors (see below), whose sum is σ = 29216198560. Its totient is φ = 14606786880.

The previous prime is 21911164601. The next prime is 21911164633. The reversal of 21911164617 is 71646111912.

It is an interprime number because it is at equal distance from previous prime (21911164601) and next prime (21911164633).

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

It is not a de Polignac number, because 21911164617 - 2⁴ = 21911164601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21911164217) 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, 79984 + ... + 224097.

It is an arithmetic number, because the mean of its divisors is an integer number (3652024820).

Almost surely, 2^21911164617 is an apocalyptic number.

It is an amenable number.

21911164617 is a deficient number, since it is larger than the sum of its proper divisors (7305033943).

21911164617 is a wasteful number, since it uses less digits than its factorization.

21911164617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328103.

The product of its digits is 18144, while the sum is 39.

The spelling of 21911164617 in words is "twenty-one billion, nine hundred eleven million, one hundred sixty-four thousand, six hundred seventeen".