145232562161 has 4 divisors (see below), whose sum is σ = 145269910500. Its totient is φ = 145195213824.

The previous prime is 145232562119. The next prime is 145232562179. The reversal of 145232562161 is 161265232541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161265232541 = 7 ⋅23037890363.

It can be written as a sum of positive squares in 2 ways, for example, as 71867422561 + 73365139600 = 268081^2 + 270860^2 .

It is a cyclic number.

It is not a de Polignac number, because 145232562161 - 2²² = 145228367857 is a prime.

It is a super-2 number, since 2×145232562161² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145232862161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18668336 + ... + 18676113.

It is an arithmetic number, because the mean of its divisors is an integer number (36317477625).

Almost surely, 2^145232562161 is an apocalyptic number.

It is an amenable number.

145232562161 is a deficient number, since it is larger than the sum of its proper divisors (37348339).

145232562161 is an equidigital number, since it uses as much as digits as its factorization.

145232562161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37348338.

The product of its digits is 86400, while the sum is 38.

The spelling of 145232562161 in words is "one hundred forty-five billion, two hundred thirty-two million, five hundred sixty-two thousand, one hundred sixty-one".