161441145361 has 4 divisors (see below), whose sum is σ = 161967012592. Its totient is φ = 160915278132.

The previous prime is 161441145293. The next prime is 161441145401. The reversal of 161441145361 is 163541144161.

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 a cyclic number.

It is not a de Polignac number, because 161441145361 - 2⁷ = 161441145233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161441145361.

It is not an unprimeable number, because it can be changed into a prime (161441145661) 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, 262933155 + ... + 262933768.

It is an arithmetic number, because the mean of its divisors is an integer number (40491753148).

Almost surely, 2^161441145361 is an apocalyptic number.

It is an amenable number.

161441145361 is a deficient number, since it is larger than the sum of its proper divisors (525867231).

161441145361 is an equidigital number, since it uses as much as digits as its factorization.

161441145361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525867230.

The product of its digits is 34560, while the sum is 37.

The spelling of 161441145361 in words is "one hundred sixty-one billion, four hundred forty-one million, one hundred forty-five thousand, three hundred sixty-one".