138420353056 has 48 divisors (see below), whose sum is σ = 274002994944. Its totient is φ = 68832900864.

The previous prime is 138420353021. The next prime is 138420353077. The reversal of 138420353056 is 650353024831.

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 7 ways as a sum of consecutive naturals, for example, 7790775 + ... + 7808521.

It is an arithmetic number, because the mean of its divisors is an integer number (5708395728).

Almost surely, 2^138420353056 is an apocalyptic number.

138420353056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138420353056 is a deficient number, since it is larger than the sum of its proper divisors (135582641888).

138420353056 is a wasteful number, since it uses less digits than its factorization.

138420353056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19073 (or 19065 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

Adding to 138420353056 its reverse (650353024831), we get a palindrome (788773377887).

The spelling of 138420353056 in words is "one hundred thirty-eight billion, four hundred twenty million, three hundred fifty-three thousand, fifty-six".