395995172641 has 2 divisors, whose sum is σ = 395995172642. Its totient is φ = 395995172640.

The previous prime is 395995172609. The next prime is 395995172659. The reversal of 395995172641 is 146271599593.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 338874172641 + 57121000000 = 582129^2 + 239000^2 .

It is a cyclic number.

It is not a de Polignac number, because 395995172641 - 2⁵ = 395995172609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 395995172641.

It is not a weakly prime, because it can be changed into another prime (395995176641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197997586320 + 197997586321.

It is an arithmetic number, because the mean of its divisors is an integer number (197997586321).

Almost surely, 2^395995172641 is an apocalyptic number.

It is an amenable number.

395995172641 is a deficient number, since it is larger than the sum of its proper divisors (1).

395995172641 is an equidigital number, since it uses as much as digits as its factorization.

395995172641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18370800, while the sum is 61.

The spelling of 395995172641 in words is "three hundred ninety-five billion, nine hundred ninety-five million, one hundred seventy-two thousand, six hundred forty-one".