162561449 has 2 divisors, whose sum is σ = 162561450. Its totient is φ = 162561448.

The previous prime is 162561431. The next prime is 162561467. The reversal of 162561449 is 944165261.

It is a balanced prime because it is at equal distance from previous prime (162561431) and next prime (162561467).

It can be written as a sum of positive squares in only one way, i.e., 115885225 + 46676224 = 10765^2 + 6832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162561449 is a prime.

It is not a weakly prime, because it can be changed into another prime (162561409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81280724 + 81280725.

It is an arithmetic number, because the mean of its divisors is an integer number (81280725).

Almost surely, 2^162561449 is an apocalyptic number.

It is an amenable number.

162561449 is a deficient number, since it is larger than the sum of its proper divisors (1).

162561449 is an equidigital number, since it uses as much as digits as its factorization.

162561449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 38.

The square root of 162561449 is about 12749.9587842471. The cubic root of 162561449 is about 545.7652174788.

The spelling of 162561449 in words is "one hundred sixty-two million, five hundred sixty-one thousand, four hundred forty-nine".