161464081 has 2 divisors, whose sum is σ = 161464082. Its totient is φ = 161464080.

The previous prime is 161464031. The next prime is 161464091. The reversal of 161464081 is 180464161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158256400 + 3207681 = 12580^2 + 1791^2 .

It is a cyclic number.

It is not a de Polignac number, because 161464081 - 2²¹ = 159366929 is a prime.

It is a super-3 number, since 3×161464081³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (161464001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80732040 + 80732041.

It is an arithmetic number, because the mean of its divisors is an integer number (80732041).

Almost surely, 2^161464081 is an apocalyptic number.

It is an amenable number.

161464081 is a deficient number, since it is larger than the sum of its proper divisors (1).

161464081 is an equidigital number, since it uses as much as digits as its factorization.

161464081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 161464081 is about 12706.8517343990. The cubic root of 161464081 is about 544.5343844643.

The spelling of 161464081 in words is "one hundred sixty-one million, four hundred sixty-four thousand, eighty-one".