17145364115421 has 12 divisors (see below), whose sum is σ = 24767243693920. Its totient is φ = 11429449936200.

The previous prime is 17145364115417. The next prime is 17145364115461. The reversal of 17145364115421 is 12451146354171.

17145364115421 is a `hidden beast` number, since 1 + 7 + 1 + 4 + 53 + 64 + 115 + 421 = 666.

It is not a de Polignac number, because 17145364115421 - 2² = 17145364115417 is a prime.

It is a super-2 number, since 2×17145364115421² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17145364115461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65930305 + ... + 66189846.

Almost surely, 2^{17145364115421} is an apocalyptic number.

It is an amenable number.

17145364115421 is a deficient number, since it is larger than the sum of its proper divisors (7621879578499).

17145364115421 is a wasteful number, since it uses less digits than its factorization.

17145364115421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132134576 (or 132134573 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The spelling of 17145364115421 in words is "seventeen trillion, one hundred forty-five billion, three hundred sixty-four million, one hundred fifteen thousand, four hundred twenty-one".