11771609905 has 16 divisors (see below), whose sum is σ = 15488345664. Its totient is φ = 8517705280.

The previous prime is 11771609873. The next prime is 11771609911. The reversal of 11771609905 is 50990617711.

It is not a de Polignac number, because 11771609905 - 2⁵ = 11771609873 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 532387 + ... + 554056.

It is an arithmetic number, because the mean of its divisors is an integer number (968021604).

Almost surely, 2^11771609905 is an apocalyptic number.

It is an amenable number.

11771609905 is a deficient number, since it is larger than the sum of its proper divisors (3716735759).

11771609905 is a wasteful number, since it uses less digits than its factorization.

11771609905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086656.

The product of its (nonzero) digits is 119070, while the sum is 46.

The spelling of 11771609905 in words is "eleven billion, seven hundred seventy-one million, six hundred nine thousand, nine hundred five".