11779561845 has 24 divisors (see below), whose sum is σ = 20421662976. Its totient is φ = 6281277408.

The previous prime is 11779561837. The next prime is 11779561873. The reversal of 11779561845 is 54816597711.

11779561845 is a `hidden beast` number, since 1 + 1 + 7 + 79 + 561 + 8 + 4 + 5 = 666.

It is not a de Polignac number, because 11779561845 - 2³ = 11779561837 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11779561791 and 11779561800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 260164 + ... + 302066.

It is an arithmetic number, because the mean of its divisors is an integer number (850902624).

Almost surely, 2^11779561845 is an apocalyptic number.

11779561845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11779561845 is a deficient number, since it is larger than the sum of its proper divisors (8642101131).

11779561845 is a wasteful number, since it uses less digits than its factorization.

11779561845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48161 (or 48158 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 54.

The spelling of 11779561845 in words is "eleven billion, seven hundred seventy-nine million, five hundred sixty-one thousand, eight hundred forty-five".