138219920684 has 24 divisors (see below), whose sum is σ = 249221158368. Its totient is φ = 67025888640.

The previous prime is 138219920659. The next prime is 138219920753. The reversal of 138219920684 is 486029912831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1455449 + ... + 1547504.

It is an arithmetic number, because the mean of its divisors is an integer number (10384214932).

Almost surely, 2^138219920684 is an apocalyptic number.

It is an amenable number.

138219920684 is a deficient number, since it is larger than the sum of its proper divisors (111001237684).

138219920684 is a wasteful number, since it uses less digits than its factorization.

138219920684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003305 (or 3003303 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 53.

The spelling of 138219920684 in words is "one hundred thirty-eight billion, two hundred nineteen million, nine hundred twenty thousand, six hundred eighty-four".