171656011413 has 24 divisors (see below), whose sum is σ = 248364551448. Its totient is φ = 114245056512.

The previous prime is 171656011409. The next prime is 171656011451. The reversal of 171656011413 is 314110656171.

It is a happy number.

171656011413 is a `hidden beast` number, since 1 + 7 + 1 + 6 + 5 + 601 + 1 + 41 + 3 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 81420056964 + 90235954449 = 285342^2 + 300393^2 .

It is not a de Polignac number, because 171656011413 - 2² = 171656011409 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171656011213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15221545 + ... + 15232817.

It is an arithmetic number, because the mean of its divisors is an integer number (10348522977).

Almost surely, 2^171656011413 is an apocalyptic number.

It is an amenable number.

171656011413 is a deficient number, since it is larger than the sum of its proper divisors (76708540035).

171656011413 is a wasteful number, since it uses less digits than its factorization.

171656011413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13973 (or 13970 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

Adding to 171656011413 its reverse (314110656171), we get a palindrome (485766667584).

The spelling of 171656011413 in words is "one hundred seventy-one billion, six hundred fifty-six million, eleven thousand, four hundred thirteen".