11081381385 has 16 divisors (see below), whose sum is σ = 17973091584. Its totient is φ = 5829109632.

The previous prime is 11081381327. The next prime is 11081381387. The reversal of 11081381385 is 58318318011.

It is a happy number.

It is not a de Polignac number, because 11081381385 - 2⁶ = 11081381321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11081381387) 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, 5058897 + ... + 5061086.

It is an arithmetic number, because the mean of its divisors is an integer number (1123318224).

Almost surely, 2^11081381385 is an apocalyptic number.

11081381385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11081381385 is a deficient number, since it is larger than the sum of its proper divisors (6891710199).

11081381385 is a wasteful number, since it uses less digits than its factorization.

11081381385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10120064.

The product of its (nonzero) digits is 23040, while the sum is 39.

Adding to 11081381385 its reverse (58318318011), we get a palindrome (69399699396).

The spelling of 11081381385 in words is "eleven billion, eighty-one million, three hundred eighty-one thousand, three hundred eighty-five".