11649761271 has 24 divisors (see below), whose sum is σ = 17015688144. Its totient is φ = 7679817600.

The previous prime is 11649761239. The next prime is 11649761297. The reversal of 11649761271 is 17216794611.

It is not a de Polignac number, because 11649761271 - 2⁵ = 11649761239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11649763271) 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, 743995 + ... + 759491.

It is an arithmetic number, because the mean of its divisors is an integer number (708987006).

Almost surely, 2^11649761271 is an apocalyptic number.

11649761271 is a deficient number, since it is larger than the sum of its proper divisors (5365926873).

11649761271 is a wasteful number, since it uses less digits than its factorization.

11649761271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16431 (or 16428 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The spelling of 11649761271 in words is "eleven billion, six hundred forty-nine million, seven hundred sixty-one thousand, two hundred seventy-one".