395423644808645 has 8 divisors (see below), whose sum is σ = 474508693184760. Its totient is φ = 316338702904000.

The previous prime is 395423644808603. The next prime is 395423644808707. The reversal of 395423644808645 is 546808446324593.

It is a Cunningham number, because it is equal to 19885262²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 517016644 + 395423127792001 = 22738^2 + 19885249^2 .

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

It is not a de Polignac number, because 395423644808645 - 2²⁶ = 395423577699781 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18205610 + ... + 33500619.

It is an arithmetic number, because the mean of its divisors is an integer number (59313586648095).

Almost surely, 2^{395423644808645} is an apocalyptic number.

It is an amenable number.

395423644808645 is a deficient number, since it is larger than the sum of its proper divisors (79085048376115).

395423644808645 is a wasteful number, since it uses less digits than its factorization.

395423644808645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53235735.

The product of its (nonzero) digits is 2388787200, while the sum is 71.

The spelling of 395423644808645 in words is "three hundred ninety-five trillion, four hundred twenty-three billion, six hundred forty-four million, eight hundred eight thousand, six hundred forty-five".