161148453489 has 9 divisors (see below), whose sum is σ = 232771727929. Its totient is φ = 107431499460.

The previous prime is 161148453463. The next prime is 161148453503. The reversal of 161148453489 is 984354841161.

The square root of 161148453489 is 401433.

It is a perfect power (a square), and thus also a powerful number.

161148453489 is a `hidden beast` number, since 1 + 6 + 1 + 148 + 453 + 48 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 161148453489 - 2¹⁵ = 161148420721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161148453419) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1137394 + ... + 1271204.

Almost surely, 2^161148453489 is an apocalyptic number.

161148453489 is the 401433-rd square number.

161148453489 is the 200717-th centered octagonal number.

It is an amenable number.

161148453489 is a deficient number, since it is larger than the sum of its proper divisors (71623274440).

161148453489 is an frugal number, since it uses more digits than its factorization.

161148453489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267628 (or 133814 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The spelling of 161148453489 in words is "one hundred sixty-one billion, one hundred forty-eight million, four hundred fifty-three thousand, four hundred eighty-nine".