1138379655 has 16 divisors (see below), whose sum is σ = 2081608704. Its totient is φ = 520402080.

The previous prime is 1138379603. The next prime is 1138379657. The reversal of 1138379655 is 5569738311.

1138379655 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1138379655 - 2¹¹ = 1138377607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138379657) 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, 5420751 + ... + 5420960.

It is an arithmetic number, because the mean of its divisors is an integer number (130100544).

Almost surely, 2^1138379655 is an apocalyptic number.

1138379655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1138379655 is a deficient number, since it is larger than the sum of its proper divisors (943229049).

1138379655 is a wasteful number, since it uses less digits than its factorization.

1138379655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10841726.

The product of its digits is 680400, while the sum is 48.

The square root of 1138379655 is about 33739.8822612054. The cubic root of 1138379655 is about 1044.1487554288.

The spelling of 1138379655 in words is "one billion, one hundred thirty-eight million, three hundred seventy-nine thousand, six hundred fifty-five".