138320494990 has 8 divisors (see below), whose sum is σ = 248976891000. Its totient is φ = 55328197992.

The previous prime is 138320494967. The next prime is 138320494993. The reversal of 138320494990 is 99494023831.

It is a happy number.

138320494990 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138320494993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6916024740 + ... + 6916024759.

It is an arithmetic number, because the mean of its divisors is an integer number (31122111375).

Almost surely, 2^138320494990 is an apocalyptic number.

138320494990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138320494990 is a deficient number, since it is larger than the sum of its proper divisors (110656396010).

138320494990 is a wasteful number, since it uses less digits than its factorization.

138320494990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13832049506.

The product of its (nonzero) digits is 1679616, while the sum is 52.

The spelling of 138320494990 in words is "one hundred thirty-eight billion, three hundred twenty million, four hundred ninety-four thousand, nine hundred ninety".