138580775 has 24 divisors (see below), whose sum is σ = 182071680. Its totient is φ = 104340960.

The previous prime is 138580751. The next prime is 138580777. The reversal of 138580775 is 577085831.

It is not a de Polignac number, because 138580775 - 2¹⁰ = 138579751 is a prime.

It is a super-5 number, since 5×138580775⁵ (a number of 42 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138580777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78452 + ... + 80198.

It is an arithmetic number, because the mean of its divisors is an integer number (7586320).

Almost surely, 2^138580775 is an apocalyptic number.

138580775 is a deficient number, since it is larger than the sum of its proper divisors (43490905).

138580775 is a wasteful number, since it uses less digits than its factorization.

138580775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943 (or 1938 counting only the distinct ones).

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

The square root of 138580775 is about 11772.0335966221. The cubic root of 138580775 is about 517.4888481964.

The spelling of 138580775 in words is "one hundred thirty-eight million, five hundred eighty thousand, seven hundred seventy-five".