631632516006665 has 16 divisors (see below), whose sum is σ = 802734616100880. Its totient is φ = 475469672079360.

The previous prime is 631632516006647. The next prime is 631632516006691. The reversal of 631632516006665 is 566600615236136.

It can be written as a sum of positive squares in 8 ways, for example, as 56371670723449 + 575260845283216 = 7508107^2 + 23984596^2 .

It is not a de Polignac number, because 631632516006665 - 2²² = 631632511812361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 631632516006665.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 878213576 + ... + 878932505.

It is an arithmetic number, because the mean of its divisors is an integer number (50170913506305).

Almost surely, 2^{631632516006665} is an apocalyptic number.

It is an amenable number.

631632516006665 is a deficient number, since it is larger than the sum of its proper divisors (171102100094215).

631632516006665 is a wasteful number, since it uses less digits than its factorization.

631632516006665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757150332.

The product of its (nonzero) digits is 20995200, while the sum is 56.

The spelling of 631632516006665 in words is "six hundred thirty-one trillion, six hundred thirty-two billion, five hundred sixteen million, six thousand, six hundred sixty-five".