395875884581 has 2 divisors, whose sum is σ = 395875884582. Its totient is φ = 395875884580.

The previous prime is 395875884577. The next prime is 395875884601. The reversal of 395875884581 is 185488578593.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 394195622500 + 1680262081 = 627850^2 + 40991^2 .

It is a cyclic number.

It is not a de Polignac number, because 395875884581 - 2² = 395875884577 is a prime.

It is a super-2 number, since 2×395875884581² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (395875884281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197937942290 + 197937942291.

It is an arithmetic number, because the mean of its divisors is an integer number (197937942291).

Almost surely, 2^395875884581 is an apocalyptic number.

It is an amenable number.

395875884581 is a deficient number, since it is larger than the sum of its proper divisors (1).

395875884581 is an equidigital number, since it uses as much as digits as its factorization.

395875884581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072000, while the sum is 71.

The spelling of 395875884581 in words is "three hundred ninety-five billion, eight hundred seventy-five million, eight hundred eighty-four thousand, five hundred eighty-one".