161367450241 has 4 divisors (see below), whose sum is σ = 163577963332. Its totient is φ = 159156937152.

The previous prime is 161367450239. The next prime is 161367450247. The reversal of 161367450241 is 142054763161.

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

It can be written as a sum of positive squares in 2 ways, for example, as 98044760641 + 63322689600 = 313121^2 + 251640^2 .

It is a cyclic number.

It is not a de Polignac number, because 161367450241 - 2¹ = 161367450239 is a prime.

It is a super-2 number, since 2×161367450241² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161367450194 and 161367450203.

It is not an unprimeable number, because it can be changed into a prime (161367450247) 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, 1105256436 + ... + 1105256581.

It is an arithmetic number, because the mean of its divisors is an integer number (40894490833).

Almost surely, 2^161367450241 is an apocalyptic number.

It is an amenable number.

161367450241 is a deficient number, since it is larger than the sum of its proper divisors (2210513091).

161367450241 is an equidigital number, since it uses as much as digits as its factorization.

161367450241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210513090.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 161367450241 in words is "one hundred sixty-one billion, three hundred sixty-seven million, four hundred fifty thousand, two hundred forty-one".