138620048770 has 32 divisors (see below), whose sum is σ = 285181907328. Its totient is φ = 47523429888.

The previous prime is 138620048731. The next prime is 138620048771. The reversal of 138620048770 is 77840026831.

It is a self number, because there is not a number n which added to its sum of digits gives 138620048770.

It is not an unprimeable number, because it can be changed into a prime (138620048771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1018674 + ... + 1146706.

It is an arithmetic number, because the mean of its divisors is an integer number (8911934604).

Almost surely, 2^138620048770 is an apocalyptic number.

138620048770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138620048770 is an abundant number, since it is smaller than the sum of its proper divisors (146561858558).

138620048770 is a wasteful number, since it uses less digits than its factorization.

138620048770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143514.

The product of its (nonzero) digits is 451584, while the sum is 46.

The spelling of 138620048770 in words is "one hundred thirty-eight billion, six hundred twenty million, forty-eight thousand, seven hundred seventy".