163451011220441 has 4 divisors (see below), whose sum is σ = 186801155680512. Its totient is φ = 140100866760372.

The previous prime is 163451011220429. The next prime is 163451011220461. The reversal of 163451011220441 is 144022110154361.

163451011220441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 163451011220441 - 2⁶ = 163451011220377 is a prime.

It is a super-3 number, since 3×163451011220441³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163451011220461) 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, 11675072230025 + ... + 11675072230038.

It is an arithmetic number, because the mean of its divisors is an integer number (46700288920128).

Almost surely, 2^{163451011220441} is an apocalyptic number.

It is an amenable number.

163451011220441 is a deficient number, since it is larger than the sum of its proper divisors (23350144460071).

163451011220441 is an equidigital number, since it uses as much as digits as its factorization.

163451011220441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23350144460070.

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 163451011220441 in words is "one hundred sixty-three trillion, four hundred fifty-one billion, eleven million, two hundred twenty thousand, four hundred forty-one".