395847085561 has 4 divisors (see below), whose sum is σ = 395850140532. Its totient is φ = 395844030592.

The previous prime is 395847085547. The next prime is 395847085567. The reversal of 395847085561 is 165580748593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165580748593 = 13 ⋅12736980661.

It can be written as a sum of positive squares in 2 ways, for example, as 379400562025 + 16446523536 = 615955^2 + 128244^2 .

It is a cyclic number.

It is not a de Polignac number, because 395847085561 - 2¹⁹ = 395846561273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 395847085561.

It is not an unprimeable number, because it can be changed into a prime (395847085567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1324096 + ... + 1595281.

It is an arithmetic number, because the mean of its divisors is an integer number (98962535133).

Almost surely, 2^395847085561 is an apocalyptic number.

It is an amenable number.

395847085561 is a deficient number, since it is larger than the sum of its proper divisors (3054971).

395847085561 is a wasteful number, since it uses less digits than its factorization.

395847085561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3054970.

The product of its (nonzero) digits is 36288000, while the sum is 61.

The spelling of 395847085561 in words is "three hundred ninety-five billion, eight hundred forty-seven million, eighty-five thousand, five hundred sixty-one".