169681600081 has 8 divisors (see below), whose sum is σ = 205328995200. Its totient is φ = 136885996608.

The previous prime is 169681600063. The next prime is 169681600103. The reversal of 169681600081 is 180006186961.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 169681600081 - 2⁹ = 169681599569 is a prime.

It is a super-2 number, since 2×169681600081² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (169681609081) 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, 712947781 + ... + 712948018.

It is an arithmetic number, because the mean of its divisors is an integer number (25666124400).

Almost surely, 2^169681600081 is an apocalyptic number.

It is an amenable number.

169681600081 is a deficient number, since it is larger than the sum of its proper divisors (35647395119).

169681600081 is a wasteful number, since it uses less digits than its factorization.

169681600081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425895823.

The product of its (nonzero) digits is 124416, while the sum is 46.

The spelling of 169681600081 in words is "one hundred sixty-nine billion, six hundred eighty-one million, six hundred thousand, eighty-one".