138555007652 has 12 divisors (see below), whose sum is σ = 242473973196. Its totient is φ = 69276729600.

The previous prime is 138555007609. The next prime is 138555007681. The reversal of 138555007652 is 256700555831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2073527296 + 136481480356 = 45536^2 + 369434^2 .

It is a junction number, because it is equal to n+sod(n) for n = 138555007597 and 138555007606.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438248 + ... + 684960.

It is an arithmetic number, because the mean of its divisors is an integer number (20206164433).

Almost surely, 2^138555007652 is an apocalyptic number.

It is an amenable number.

138555007652 is a deficient number, since it is larger than the sum of its proper divisors (103918965544).

138555007652 is a wasteful number, since it uses less digits than its factorization.

138555007652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387118 (or 387116 counting only the distinct ones).

The product of its (nonzero) digits is 1260000, while the sum is 47.

The spelling of 138555007652 in words is "one hundred thirty-eight billion, five hundred fifty-five million, seven thousand, six hundred fifty-two".