399662096465 has 8 divisors (see below), whose sum is σ = 480248810088. Its totient is φ = 319293480960.

The previous prime is 399662096453. The next prime is 399662096489. The reversal of 399662096465 is 564690266993.

It can be written as a sum of positive squares in 4 ways, for example, as 248082690241 + 151579406224 = 498079^2 + 389332^2 .

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

It is not a de Polignac number, because 399662096465 - 2⁸ = 399662096209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54520496 + ... + 54527825.

It is an arithmetic number, because the mean of its divisors is an integer number (60031101261).

Almost surely, 2^399662096465 is an apocalyptic number.

It is an amenable number.

399662096465 is a deficient number, since it is larger than the sum of its proper divisors (80586713623).

399662096465 is a wasteful number, since it uses less digits than its factorization.

399662096465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109049059.

The product of its (nonzero) digits is 113374080, while the sum is 65.

The spelling of 399662096465 in words is "three hundred ninety-nine billion, six hundred sixty-two million, ninety-six thousand, four hundred sixty-five".