138207090902 has 8 divisors (see below), whose sum is σ = 208802080200. Its totient is φ = 68606397504.

The previous prime is 138207090851. The next prime is 138207090979. The reversal of 138207090902 is 209090702831.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 138207090902.

It is a congruent number.

It is an unprimeable number.

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, 248573627 + ... + 248574182.

It is an arithmetic number, because the mean of its divisors is an integer number (26100260025).

Almost surely, 2^138207090902 is an apocalyptic number.

138207090902 is a deficient number, since it is larger than the sum of its proper divisors (70594989298).

138207090902 is a wasteful number, since it uses less digits than its factorization.

138207090902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497147950.

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 138207090902 in words is "one hundred thirty-eight billion, two hundred seven million, ninety thousand, nine hundred two".