138681983530 has 16 divisors (see below), whose sum is σ = 249635273184. Its totient is φ = 55471081680.

The previous prime is 138681983507. The next prime is 138681983533. The reversal of 138681983530 is 35389186831.

It is not an unprimeable number, because it can be changed into a prime (138681983533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156925 + ... + 549535.

It is an arithmetic number, because the mean of its divisors is an integer number (15602204574).

Almost surely, 2^138681983530 is an apocalyptic number.

138681983530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138681983530 is a deficient number, since it is larger than the sum of its proper divisors (110953289654).

138681983530 is a wasteful number, since it uses less digits than its factorization.

138681983530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427941.

The product of its (nonzero) digits is 3732480, while the sum is 55.

It can be divided in two parts, 138681 and 983530, that added together give a palindrome (1122211).

The spelling of 138681983530 in words is "one hundred thirty-eight billion, six hundred eighty-one million, nine hundred eighty-three thousand, five hundred thirty".