11438639667 has 32 divisors (see below), whose sum is σ = 20856783360. Its totient is φ = 6033566880.

The previous prime is 11438639647. The next prime is 11438639713. The reversal of 11438639667 is 76693683411.

It is a happy number.

11438639667 is a `hidden beast` number, since 1 + 1 + 438 + 63 + 96 + 67 = 666.

It is not a de Polignac number, because 11438639667 - 2⁸ = 11438639411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11438639647) 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, 2325309 + ... + 2330222.

It is an arithmetic number, because the mean of its divisors is an integer number (651774480).

Almost surely, 2^11438639667 is an apocalyptic number.

11438639667 is a deficient number, since it is larger than the sum of its proper divisors (9418143693).

11438639667 is a wasteful number, since it uses less digits than its factorization.

11438639667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4655560 (or 4655554 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The spelling of 11438639667 in words is "eleven billion, four hundred thirty-eight million, six hundred thirty-nine thousand, six hundred sixty-seven".