138577608555 has 32 divisors (see below), whose sum is σ = 233415978240. Its totient is φ = 70011527040.

The previous prime is 138577608551. The next prime is 138577608599. The reversal of 138577608555 is 555806775831.

It is not a de Polignac number, because 138577608555 - 2² = 138577608551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138577608551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4653744 + ... + 4683426.

It is an arithmetic number, because the mean of its divisors is an integer number (7294249320).

Almost surely, 2^138577608555 is an apocalyptic number.

138577608555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138577608555 is a deficient number, since it is larger than the sum of its proper divisors (94838369685).

138577608555 is a wasteful number, since it uses less digits than its factorization.

138577608555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46091.

The product of its (nonzero) digits is 35280000, while the sum is 60.

The spelling of 138577608555 in words is "one hundred thirty-eight billion, five hundred seventy-seven million, six hundred eight thousand, five hundred fifty-five".