3638634531842 has 8 divisors (see below), whose sum is σ = 5457963881232. Its totient is φ = 1819313238100.

The previous prime is 3638634531841. The next prime is 3638634531853. The reversal of 3638634531842 is 2481354368363.

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

It is a super-3 number, since 3×3638634531842³ (a number of 39 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (3638634531841) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 717884 + ... + 2791527.

It is an arithmetic number, because the mean of its divisors is an integer number (682245485154).

Almost surely, 2^{3638634531842} is an apocalyptic number.

3638634531842 is a deficient number, since it is larger than the sum of its proper divisors (1819329349390).

3638634531842 is a wasteful number, since it uses less digits than its factorization.

3638634531842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4027824.

The product of its digits is 29859840, while the sum is 56.

The spelling of 3638634531842 in words is "three trillion, six hundred thirty-eight billion, six hundred thirty-four million, five hundred thirty-one thousand, eight hundred forty-two".