146881338581 has 2 divisors, whose sum is σ = 146881338582. Its totient is φ = 146881338580.

The previous prime is 146881338533. The next prime is 146881338601. The reversal of 146881338581 is 185833188641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110467157956 + 36414180625 = 332366^2 + 190825^2 .

It is a cyclic number.

It is not a de Polignac number, because 146881338581 - 2⁶ = 146881338517 is a prime.

It is a super-2 number, since 2×146881338581² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146881338521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73440669290 + 73440669291.

It is an arithmetic number, because the mean of its divisors is an integer number (73440669291).

Almost surely, 2^146881338581 is an apocalyptic number.

It is an amenable number.

146881338581 is a deficient number, since it is larger than the sum of its proper divisors (1).

146881338581 is an equidigital number, since it uses as much as digits as its factorization.

146881338581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4423680, while the sum is 56.

The spelling of 146881338581 in words is "one hundred forty-six billion, eight hundred eighty-one million, three hundred thirty-eight thousand, five hundred eighty-one".