1838707717138 has 16 divisors (see below), whose sum is σ = 2765576689920. Its totient is φ = 916849036656.

The previous prime is 1838707717127. The next prime is 1838707717139. The reversal of 1838707717138 is 8317177078381.

It is a happy number.

It is a super-2 number, since 2×1838707717138² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1838707717139) 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 7 ways as a sum of consecutive naturals, for example, 24570943 + ... + 24645661.

It is an arithmetic number, because the mean of its divisors is an integer number (172848543120).

Almost surely, 2^{1838707717138} is an apocalyptic number.

1838707717138 is a deficient number, since it is larger than the sum of its proper divisors (926868972782).

1838707717138 is a wasteful number, since it uses less digits than its factorization.

1838707717138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108081.

The product of its (nonzero) digits is 11063808, while the sum is 61.

The spelling of 1838707717138 in words is "one trillion, eight hundred thirty-eight billion, seven hundred seven million, seven hundred seventeen thousand, one hundred thirty-eight".