162539561 has 2 divisors, whose sum is σ = 162539562. Its totient is φ = 162539560.

The previous prime is 162539501. The next prime is 162539579. The reversal of 162539561 is 165935261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135862336 + 26677225 = 11656^2 + 5165^2 .

It is a cyclic number.

It is not a de Polignac number, because 162539561 - 2²⁶ = 95430697 is a prime.

It is not a weakly prime, because it can be changed into another prime (162539501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81269780 + 81269781.

It is an arithmetic number, because the mean of its divisors is an integer number (81269781).

Almost surely, 2^162539561 is an apocalyptic number.

It is an amenable number.

162539561 is a deficient number, since it is larger than the sum of its proper divisors (1).

162539561 is an equidigital number, since it uses as much as digits as its factorization.

162539561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 38.

The square root of 162539561 is about 12749.1003996360. The cubic root of 162539561 is about 545.7407216234.

The spelling of 162539561 in words is "one hundred sixty-two million, five hundred thirty-nine thousand, five hundred sixty-one".