161456441 has 2 divisors, whose sum is σ = 161456442. Its totient is φ = 161456440.

The previous prime is 161456411. The next prime is 161456453. The reversal of 161456441 is 144654161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160782400 + 674041 = 12680^2 + 821^2 .

It is a cyclic number.

It is not a de Polignac number, because 161456441 - 2²⁶ = 94347577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161456398 and 161456407.

It is not a weakly prime, because it can be changed into another prime (161456411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80728220 + 80728221.

It is an arithmetic number, because the mean of its divisors is an integer number (80728221).

Almost surely, 2^161456441 is an apocalyptic number.

It is an amenable number.

161456441 is a deficient number, since it is larger than the sum of its proper divisors (1).

161456441 is an equidigital number, since it uses as much as digits as its factorization.

161456441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

The square root of 161456441 is about 12706.5511056305. The cubic root of 161456441 is about 544.5257957464.

The spelling of 161456441 in words is "one hundred sixty-one million, four hundred fifty-six thousand, four hundred forty-one".