138832570820 has 12 divisors (see below), whose sum is σ = 291548398764. Its totient is φ = 55533028320.

The previous prime is 138832570819. The next prime is 138832570829. The reversal of 138832570820 is 28075238831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 71156629504 + 67675941316 = 266752^2 + 260146^2 .

It is not an unprimeable number, because it can be changed into a prime (138832570829) 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, 3470814251 + ... + 3470814290.

It is an arithmetic number, because the mean of its divisors is an integer number (24295699897).

Almost surely, 2^138832570820 is an apocalyptic number.

138832570820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138832570820 is an abundant number, since it is smaller than the sum of its proper divisors (152715827944).

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

138832570820 is a wasteful number, since it uses less digits than its factorization.

138832570820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6941628550 (or 6941628548 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 138832570820 in words is "one hundred thirty-eight billion, eight hundred thirty-two million, five hundred seventy thousand, eight hundred twenty".