146645223181 has 2 divisors, whose sum is σ = 146645223182. Its totient is φ = 146645223180.

The previous prime is 146645223169. The next prime is 146645223287. The reversal of 146645223181 is 181322546641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137276919081 + 9368304100 = 370509^2 + 96790^2 .

It is a cyclic number.

It is not a de Polignac number, because 146645223181 - 2¹⁵ = 146645190413 is a prime.

It is a super-2 number, since 2×146645223181² (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 (146645223121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73322611590 + 73322611591.

It is an arithmetic number, because the mean of its divisors is an integer number (73322611591).

Almost surely, 2^146645223181 is an apocalyptic number.

It is an amenable number.

146645223181 is a deficient number, since it is larger than the sum of its proper divisors (1).

146645223181 is an equidigital number, since it uses as much as digits as its factorization.

146645223181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 43.

The spelling of 146645223181 in words is "one hundred forty-six billion, six hundred forty-five million, two hundred twenty-three thousand, one hundred eighty-one".