11549961071 has 4 divisors (see below), whose sum is σ = 12599957544. Its totient is φ = 10499964600.

The previous prime is 11549961043. The next prime is 11549961079. The reversal of 11549961071 is 17016994511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11549961071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11549961079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524998220 + ... + 524998241.

It is an arithmetic number, because the mean of its divisors is an integer number (3149989386).

Almost surely, 2^11549961071 is an apocalyptic number.

11549961071 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11549961071 is a deficient number, since it is larger than the sum of its proper divisors (1049996473).

11549961071 is a wasteful number, since it uses less digits than its factorization.

11549961071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049996472.

The product of its (nonzero) digits is 68040, while the sum is 44.

The spelling of 11549961071 in words is "eleven billion, five hundred forty-nine million, nine hundred sixty-one thousand, seventy-one".