395545516521 has 8 divisors (see below), whose sum is σ = 544406732544. Its totient is φ = 255190655760.

The previous prime is 395545516517. The next prime is 395545516571. The reversal of 395545516521 is 125615545593.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 395545516521 - 2² = 395545516517 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (395545516571) 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 in 7 ways as a sum of consecutive naturals, for example, 2126588706 + ... + 2126588891.

It is an arithmetic number, because the mean of its divisors is an integer number (68050841568).

Almost surely, 2^395545516521 is an apocalyptic number.

395545516521 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

395545516521 is a deficient number, since it is larger than the sum of its proper divisors (148861216023).

395545516521 is a wasteful number, since it uses less digits than its factorization.

395545516521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4253177631.

The product of its digits is 4050000, while the sum is 51.

The spelling of 395545516521 in words is "three hundred ninety-five billion, five hundred forty-five million, five hundred sixteen thousand, five hundred twenty-one".