138770508500 has 48 divisors (see below), whose sum is σ = 326388251280. Its totient is φ = 51238339200.

The previous prime is 138770508469. The next prime is 138770508523. The reversal of 138770508500 is 5805077831.

It can be written as a sum of positive squares in 8 ways, for example, as 85014231184 + 53756277316 = 291572^2 + 231854^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10668155 + ... + 10681154.

It is an arithmetic number, because the mean of its divisors is an integer number (6799755235).

Almost surely, 2^138770508500 is an apocalyptic number.

138770508500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138770508500 is an abundant number, since it is smaller than the sum of its proper divisors (187617742780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138770508500 is a wasteful number, since it uses less digits than its factorization.

138770508500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21349341 (or 21349329 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 44.

The spelling of 138770508500 in words is "one hundred thirty-eight billion, seven hundred seventy million, five hundred eight thousand, five hundred".