11405438858 has 32 divisors (see below), whose sum is σ = 19709609472. Its totient is φ = 4899122800.

The previous prime is 11405438851. The next prime is 11405438867. The reversal of 11405438858 is 85883450411.

It is not an unprimeable number, because it can be changed into a prime (11405438851) 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, 93788 + ... + 177783.

It is an arithmetic number, because the mean of its divisors is an integer number (615925296).

Almost surely, 2^11405438858 is an apocalyptic number.

11405438858 is a deficient number, since it is larger than the sum of its proper divisors (8304170614).

11405438858 is a wasteful number, since it uses less digits than its factorization.

11405438858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271690.

The product of its (nonzero) digits is 614400, while the sum is 47.

The spelling of 11405438858 in words is "eleven billion, four hundred five million, four hundred thirty-eight thousand, eight hundred fifty-eight".