3999662634641 has 8 divisors (see below), whose sum is σ = 4134728957184. Its totient is φ = 3864974121360.

The previous prime is 3999662634631. The next prime is 3999662634679. The reversal of 3999662634641 is 1464362669993.

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

It is not a de Polignac number, because 3999662634641 - 2¹⁴ = 3999662618257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3999662634631) 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, 94430786 + ... + 94473131.

It is an arithmetic number, because the mean of its divisors is an integer number (516841119648).

Almost surely, 2^{3999662634641} is an apocalyptic number.

3999662634641 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3999662634641 is a deficient number, since it is larger than the sum of its proper divisors (135066322543).

3999662634641 is a wasteful number, since it uses less digits than its factorization.

3999662634641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188904631.

The product of its digits is 272097792, while the sum is 68.

The spelling of 3999662634641 in words is "three trillion, nine hundred ninety-nine billion, six hundred sixty-two million, six hundred thirty-four thousand, six hundred forty-one".