138220691036 has 12 divisors (see below), whose sum is σ = 243284396712. Its totient is φ = 68710863408.

The previous prime is 138220691033. The next prime is 138220691053. The reversal of 138220691036 is 630196022831.

It is a junction number, because it is equal to n+sod(n) for n = 138220690984 and 138220691002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138220691033) 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 3 ways as a sum of consecutive naturals, for example, 99869750 + ... + 99871133.

It is an arithmetic number, because the mean of its divisors is an integer number (20273699726).

Almost surely, 2^138220691036 is an apocalyptic number.

It is an amenable number.

138220691036 is a deficient number, since it is larger than the sum of its proper divisors (105063705676).

138220691036 is a wasteful number, since it uses less digits than its factorization.

138220691036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199741060 (or 199741058 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The spelling of 138220691036 in words is "one hundred thirty-eight billion, two hundred twenty million, six hundred ninety-one thousand, thirty-six".