163954132951 has 4 divisors (see below), whose sum is σ = 187376151952. Its totient is φ = 140532113952.

The previous prime is 163954132919. The next prime is 163954132957. The reversal of 163954132951 is 159231459361.

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 163954132951 - 2⁵ = 163954132919 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163954132895 and 163954132904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163954132957) 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, 11711009490 + ... + 11711009503.

It is an arithmetic number, because the mean of its divisors is an integer number (46844037988).

Almost surely, 2^163954132951 is an apocalyptic number.

163954132951 is a deficient number, since it is larger than the sum of its proper divisors (23422019001).

163954132951 is an equidigital number, since it uses as much as digits as its factorization.

163954132951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23422019000.

The product of its digits is 874800, while the sum is 49.

The spelling of 163954132951 in words is "one hundred sixty-three billion, nine hundred fifty-four million, one hundred thirty-two thousand, nine hundred fifty-one".