11747547965 has 12 divisors (see below), whose sum is σ = 14736624924. Its totient is φ = 8989425984.

The previous prime is 11747547947. The next prime is 11747548003. The reversal of 11747547965 is 56974574711.

It can be written as a sum of positive squares in 2 ways, for example, as 2424873049 + 9322674916 = 49243^2 + 96554^2 .

It is not a de Polignac number, because 11747547965 - 2³⁰ = 10673806141 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11747547965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2218064 + ... + 2223353.

It is an arithmetic number, because the mean of its divisors is an integer number (1228052077).

Almost surely, 2^11747547965 is an apocalyptic number.

It is an amenable number.

11747547965 is a deficient number, since it is larger than the sum of its proper divisors (2989076959).

11747547965 is an equidigital number, since it uses as much as digits as its factorization.

11747547965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4441468 (or 4441445 counting only the distinct ones).

The product of its digits is 7408800, while the sum is 56.

The spelling of 11747547965 in words is "eleven billion, seven hundred forty-seven million, five hundred forty-seven thousand, nine hundred sixty-five".