395513671645 has 8 divisors (see below), whose sum is σ = 474620422104. Its totient is φ = 316408259904.

The previous prime is 395513671591. The next prime is 395513671661. The reversal of 395513671645 is 546176315593.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42684799609 + 352828872036 = 206603^2 + 593994^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 395513671645 - 2⁷ = 395513671517 is a prime.

It is a Duffinian number.

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, 508347 + ... + 1024423.

It is an arithmetic number, because the mean of its divisors is an integer number (59327552763).

Almost surely, 2^395513671645 is an apocalyptic number.

It is an amenable number.

395513671645 is a deficient number, since it is larger than the sum of its proper divisors (79106750459).

395513671645 is a wasteful number, since it uses less digits than its factorization.

395513671645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669359.

The product of its digits is 10206000, while the sum is 55.

The spelling of 395513671645 in words is "three hundred ninety-five billion, five hundred thirteen million, six hundred seventy-one thousand, six hundred forty-five".