396741807817 has 8 divisors (see below), whose sum is σ = 420807612456. Its totient is φ = 372756897792.

The previous prime is 396741807809. The next prime is 396741807857. The reversal of 396741807817 is 718708147693.

It can be written as a sum of positive squares in 4 ways, for example, as 304677504576 + 92064303241 = 551976^2 + 303421^2 .

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 396741807817 - 2³ = 396741807809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (396741807857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20213548 + ... + 20233165.

It is an arithmetic number, because the mean of its divisors is an integer number (52600951557).

Almost surely, 2^396741807817 is an apocalyptic number.

It is an amenable number.

396741807817 is a deficient number, since it is larger than the sum of its proper divisors (24065804639).

396741807817 is a wasteful number, since it uses less digits than its factorization.

396741807817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40447307.

The product of its (nonzero) digits is 14224896, while the sum is 61.

The spelling of 396741807817 in words is "three hundred ninety-six billion, seven hundred forty-one million, eight hundred seven thousand, eight hundred seventeen".