1683641216438 has 32 divisors (see below), whose sum is σ = 2828096519040. Its totient is φ = 747044242560.

The previous prime is 1683641216431. The next prime is 1683641216449. The reversal of 1683641216438 is 8346121463861.

It is a happy number.

It is a super-2 number, since 2×1683641216438² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1683641216438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1683641216431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6039656 + ... + 6312267.

It is an arithmetic number, because the mean of its divisors is an integer number (88378016220).

Almost surely, 2^{1683641216438} is an apocalyptic number.

1683641216438 is a deficient number, since it is larger than the sum of its proper divisors (1144455302602).

1683641216438 is a wasteful number, since it uses less digits than its factorization.

1683641216438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12352172.

The product of its digits is 3981312, while the sum is 53.

The spelling of 1683641216438 in words is "one trillion, six hundred eighty-three billion, six hundred forty-one million, two hundred sixteen thousand, four hundred thirty-eight".