395280497665 has 16 divisors (see below), whose sum is σ = 474769062288. Its totient is φ = 315936215296.

The previous prime is 395280497657. The next prime is 395280497687. The reversal of 395280497665 is 566794082593.

It can be written as a sum of positive squares in 8 ways, for example, as 1259398144 + 394021099521 = 35488^2 + 627711^2 .

It is a cyclic number.

It is not a de Polignac number, because 395280497665 - 2³ = 395280497657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 395280497597 and 395280497606.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46103319 + ... + 46111891.

It is an arithmetic number, because the mean of its divisors is an integer number (29673066393).

Almost surely, 2^395280497665 is an apocalyptic number.

It is an amenable number.

395280497665 is a deficient number, since it is larger than the sum of its proper divisors (79488564623).

395280497665 is a wasteful number, since it uses less digits than its factorization.

395280497665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15908.

The product of its (nonzero) digits is 97977600, while the sum is 64.

The spelling of 395280497665 in words is "three hundred ninety-five billion, two hundred eighty million, four hundred ninety-seven thousand, six hundred sixty-five".