138553355527 has 4 divisors (see below), whose sum is σ = 139898533840. Its totient is φ = 137208177216.

The previous prime is 138553355519. The next prime is 138553355533. The reversal of 138553355527 is 725553355831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138553355527 - 2³ = 138553355519 is a prime.

It is a super-2 number, since 2×138553355527² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138553355557) 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, 672589002 + ... + 672589207.

It is an arithmetic number, because the mean of its divisors is an integer number (34974633460).

Almost surely, 2^138553355527 is an apocalyptic number.

138553355527 is a deficient number, since it is larger than the sum of its proper divisors (1345178313).

138553355527 is a wasteful number, since it uses less digits than its factorization.

138553355527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345178312.

The product of its digits is 9450000, while the sum is 52.

The spelling of 138553355527 in words is "one hundred thirty-eight billion, five hundred fifty-three million, three hundred fifty-five thousand, five hundred twenty-seven".