138560506952 has 96 divisors (see below), whose sum is σ = 320157369720. Its totient is φ = 55861585920.

The previous prime is 138560506927. The next prime is 138560506957. The reversal of 138560506952 is 259605065831.

It can be written as a sum of positive squares in 4 ways, for example, as 134121483076 + 4439023876 = 366226^2 + 66626^2 .

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 138560506952.

It is not an unprimeable number, because it can be changed into a prime (138560506957) 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 23 ways as a sum of consecutive naturals, for example, 17462378 + ... + 17470310.

Almost surely, 2^138560506952 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138560506952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160078684860).

138560506952 is an abundant number, since it is smaller than the sum of its proper divisors (181596862768).

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

138560506952 is a wasteful number, since it uses less digits than its factorization.

138560506952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10591 (or 10580 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 50.

The spelling of 138560506952 in words is "one hundred thirty-eight billion, five hundred sixty million, five hundred six thousand, nine hundred fifty-two".