395448071749 has 4 divisors (see below), whose sum is σ = 399076035820. Its totient is φ = 391820107680.

The previous prime is 395448071747. The next prime is 395448071773. The reversal of 395448071749 is 947170844593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 947170844593 = 233 ⋅4065110921.

It can be written as a sum of positive squares in 2 ways, for example, as 106418183524 + 289029888225 = 326218^2 + 537615^2 .

It is a cyclic number.

It is not a de Polignac number, because 395448071749 - 2¹ = 395448071747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395448071747) 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 in 3 ways as a sum of consecutive naturals, for example, 1813981872 + ... + 1813982089.

It is an arithmetic number, because the mean of its divisors is an integer number (99769008955).

Almost surely, 2^395448071749 is an apocalyptic number.

It is an amenable number.

395448071749 is a deficient number, since it is larger than the sum of its proper divisors (3627964071).

395448071749 is a wasteful number, since it uses less digits than its factorization.

395448071749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3627964070.

The product of its (nonzero) digits is 30481920, while the sum is 61.

The spelling of 395448071749 in words is "three hundred ninety-five billion, four hundred forty-eight million, seventy-one thousand, seven hundred forty-nine".