163969214951 has 4 divisors (see below), whose sum is σ = 167782452552. Its totient is φ = 160155977352.

The previous prime is 163969214921. The next prime is 163969214953. The reversal of 163969214951 is 159412969361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 163969214951 - 2¹⁴ = 163969198567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163969214953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1906618736 + ... + 1906618821.

It is an arithmetic number, because the mean of its divisors is an integer number (41945613138).

Almost surely, 2^163969214951 is an apocalyptic number.

163969214951 is a deficient number, since it is larger than the sum of its proper divisors (3813237601).

163969214951 is an equidigital number, since it uses as much as digits as its factorization.

163969214951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3813237600.

The product of its digits is 3149280, while the sum is 56.

The spelling of 163969214951 in words is "one hundred sixty-three billion, nine hundred sixty-nine million, two hundred fourteen thousand, nine hundred fifty-one".