138857782555 has 16 divisors (see below), whose sum is σ = 175465637280. Its totient is φ = 105199782912.

The previous prime is 138857782549. The next prime is 138857782559. The reversal of 138857782555 is 555287758831.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 138857782555 - 2⁵ = 138857782523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138857782559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22644 + ... + 527473.

It is an arithmetic number, because the mean of its divisors is an integer number (10966602330).

Almost surely, 2^138857782555 is an apocalyptic number.

138857782555 is a deficient number, since it is larger than the sum of its proper divisors (36607854725).

138857782555 is a wasteful number, since it uses less digits than its factorization.

138857782555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552798.

The product of its digits is 94080000, while the sum is 64.

The spelling of 138857782555 in words is "one hundred thirty-eight billion, eight hundred fifty-seven million, seven hundred eighty-two thousand, five hundred fifty-five".