145618515181 has 2 divisors, whose sum is σ = 145618515182. Its totient is φ = 145618515180.

The previous prime is 145618515151. The next prime is 145618515209. The reversal of 145618515181 is 181515816541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140599501156 + 5019014025 = 374966^2 + 70845^2 .

It is a cyclic number.

It is not a de Polignac number, because 145618515181 - 2¹⁹ = 145617990893 is a prime.

It is a super-2 number, since 2×145618515181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145618515151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72809257590 + 72809257591.

It is an arithmetic number, because the mean of its divisors is an integer number (72809257591).

Almost surely, 2^145618515181 is an apocalyptic number.

It is an amenable number.

145618515181 is a deficient number, since it is larger than the sum of its proper divisors (1).

145618515181 is an equidigital number, since it uses as much as digits as its factorization.

145618515181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192000, while the sum is 46.

The spelling of 145618515181 in words is "one hundred forty-five billion, six hundred eighteen million, five hundred fifteen thousand, one hundred eighty-one".