163797685932409 has 3 divisors (see below), whose sum is σ = 163797698730757. Its totient is φ = 163797673134062.

The previous prime is 163797685932407. The next prime is 163797685932481. The reversal of 163797685932409 is 904239586797361.

The square root of 163797685932409 is 12798347.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 163797685932409 - 2¹ = 163797685932407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163797685932407) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6399174 + ... + 19197520.

It is a 1-persistent number, because it is pandigital, but 2⋅163797685932409 = 327595371864818 is not.

Almost surely, 2^{163797685932409} is an apocalyptic number.

163797685932409 is the 12798347-th square number.

163797685932409 is the 6399174-th centered octagonal number.

It is an amenable number.

163797685932409 is a deficient number, since it is larger than the sum of its proper divisors (12798348).

163797685932409 is an frugal number, since it uses more digits than its factorization.

163797685932409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25596694 (or 12798347 counting only the distinct ones).

The product of its (nonzero) digits is 3703553280, while the sum is 79.

The spelling of 163797685932409 in words is "one hundred sixty-three trillion, seven hundred ninety-seven billion, six hundred eighty-five million, nine hundred thirty-two thousand, four hundred nine".