11138409873 has 10 divisors (see below), whose sum is σ = 16638859314. Its totient is φ = 7425606528.

The previous prime is 11138409869. The next prime is 11138409907. The reversal of 11138409873 is 37890483111.

11138409873 is a `hidden beast` number, since 111 + 384 + 0 + 98 + 73 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10914398784 + 224011089 = 104472^2 + 14967^2 .

It is not a de Polignac number, because 11138409873 - 2² = 11138409869 is a prime.

It is a super-2 number, since 2×11138409873² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11138409473) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 68755536 + ... + 68755697.

Almost surely, 2^11138409873 is an apocalyptic number.

It is an amenable number.

11138409873 is a deficient number, since it is larger than the sum of its proper divisors (5500449441).

11138409873 is an equidigital number, since it uses as much as digits as its factorization.

11138409873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137511245 (or 137511236 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 11138409873 in words is "eleven billion, one hundred thirty-eight million, four hundred nine thousand, eight hundred seventy-three".