11747768085 has 24 divisors (see below), whose sum is σ = 20391900984. Its totient is φ = 6256521600.

The previous prime is 11747768083. The next prime is 11747768099. The reversal of 11747768085 is 58086774711.

11747768085 is a `hidden beast` number, since 1 + 17 + 477 + 6 + 80 + 85 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1109289636 + 10638478449 = 33306^2 + 103143^2 .

It is not a de Polignac number, because 11747768085 - 2¹ = 11747768083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11747768083) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154662 + ... + 217751.

It is an arithmetic number, because the mean of its divisors is an integer number (849662541).

Almost surely, 2^11747768085 is an apocalyptic number.

11747768085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11747768085 is a deficient number, since it is larger than the sum of its proper divisors (8644132899).

11747768085 is a wasteful number, since it uses less digits than its factorization.

11747768085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373125 (or 373122 counting only the distinct ones).

The product of its (nonzero) digits is 2634240, while the sum is 54.

The spelling of 11747768085 in words is "eleven billion, seven hundred forty-seven million, seven hundred sixty-eight thousand, eighty-five".