138526553 has 8 divisors (see below), whose sum is σ = 151609536. Its totient is φ = 125525200.

The previous prime is 138526517. The next prime is 138526561. The reversal of 138526553 is 355625831.

138526553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138526553 - 2¹⁰ = 138525529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138520553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16826 + ... + 23667.

It is an arithmetic number, because the mean of its divisors is an integer number (18951192).

Almost surely, 2^138526553 is an apocalyptic number.

It is an amenable number.

138526553 is a deficient number, since it is larger than the sum of its proper divisors (13082983).

138526553 is a wasteful number, since it uses less digits than its factorization.

138526553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40815.

The product of its digits is 108000, while the sum is 38.

The square root of 138526553 is about 11769.7303707434. The cubic root of 138526553 is about 517.4213473937.

The spelling of 138526553 in words is "one hundred thirty-eight million, five hundred twenty-six thousand, five hundred fifty-three".