451643633402665 has 16 divisors (see below), whose sum is σ = 592536322097280. Its totient is φ = 327749348430720.

The previous prime is 451643633402653. The next prime is 451643633402677. The reversal of 451643633402665 is 566204336346154.

It is an interprime number because it is at equal distance from previous prime (451643633402653) and next prime (451643633402677).

It is not a de Polignac number, because 451643633402665 - 2¹⁵ = 451643633369897 is a prime.

It is a super-2 number, since 2×451643633402665² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8984332005 + ... + 8984382274.

It is an arithmetic number, because the mean of its divisors is an integer number (37033520131080).

Almost surely, 2^{451643633402665} is an apocalyptic number.

It is an amenable number.

451643633402665 is a deficient number, since it is larger than the sum of its proper divisors (140892688694615).

451643633402665 is a wasteful number, since it uses less digits than its factorization.

451643633402665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17968714752.

The product of its (nonzero) digits is 111974400, while the sum is 58.

The spelling of 451643633402665 in words is "four hundred fifty-one trillion, six hundred forty-three billion, six hundred thirty-three million, four hundred two thousand, six hundred sixty-five".