17157446164221 has 16 divisors (see below), whose sum is σ = 24957214605120. Its totient is φ = 10398065022720.

The previous prime is 17157446164151. The next prime is 17157446164237. The reversal of 17157446164221 is 12246164475171.

It is not a de Polignac number, because 17157446164221 - 2¹³ = 17157446156029 is a prime.

It is a super-2 number, since 2×17157446164221² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17157446164291) 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, 8779036 + ... + 10553973.

It is an arithmetic number, because the mean of its divisors is an integer number (1559825912820).

Almost surely, 2^{17157446164221} is an apocalyptic number.

17157446164221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

17157446164221 is a deficient number, since it is larger than the sum of its proper divisors (7799768440899).

17157446164221 is a wasteful number, since it uses less digits than its factorization.

17157446164221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19359916.

The product of its digits is 2257920, while the sum is 51.

The spelling of 17157446164221 in words is "seventeen trillion, one hundred fifty-seven billion, four hundred forty-six million, one hundred sixty-four thousand, two hundred twenty-one".