11775406538 has 8 divisors (see below), whose sum is σ = 20186411232. Its totient is φ = 5046602796.

The previous prime is 11775406463. The next prime is 11775406543. The reversal of 11775406538 is 83560457711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 11775406492 and 11775406501.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420550220 + ... + 420550247.

It is an arithmetic number, because the mean of its divisors is an integer number (2523301404).

Almost surely, 2^11775406538 is an apocalyptic number.

11775406538 is a deficient number, since it is larger than the sum of its proper divisors (8411004694).

11775406538 is an equidigital number, since it uses as much as digits as its factorization.

11775406538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841100476.

The product of its (nonzero) digits is 705600, while the sum is 47.

The spelling of 11775406538 in words is "eleven billion, seven hundred seventy-five million, four hundred six thousand, five hundred thirty-eight".