203456631161 has 4 divisors (see below), whose sum is σ = 232521864192. Its totient is φ = 174391398132.

The previous prime is 203456631097. The next prime is 203456631173. The reversal of 203456631161 is 161136654302.

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 203456631161 - 2⁶ = 203456631097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (203456631461) 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, 14532616505 + ... + 14532616518.

It is an arithmetic number, because the mean of its divisors is an integer number (58130466048).

Almost surely, 2^203456631161 is an apocalyptic number.

It is an amenable number.

203456631161 is a deficient number, since it is larger than the sum of its proper divisors (29065233031).

203456631161 is an equidigital number, since it uses as much as digits as its factorization.

203456631161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29065233030.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 203456631161 in words is "two hundred three billion, four hundred fifty-six million, six hundred thirty-one thousand, one hundred sixty-one".