11171994529 has 4 divisors (see below), whose sum is σ = 11338740784. Its totient is φ = 11005248276.

The previous prime is 11171994443. The next prime is 11171994541. The reversal of 11171994529 is 92549917111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92549917111 = 19 ⋅4871048269.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11171994529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11171994629) 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, 83373027 + ... + 83373160.

It is an arithmetic number, because the mean of its divisors is an integer number (2834685196).

Almost surely, 2^11171994529 is an apocalyptic number.

It is an amenable number.

11171994529 is a deficient number, since it is larger than the sum of its proper divisors (166746255).

11171994529 is an equidigital number, since it uses as much as digits as its factorization.

11171994529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166746254.

The product of its digits is 204120, while the sum is 49.

The spelling of 11171994529 in words is "eleven billion, one hundred seventy-one million, nine hundred ninety-four thousand, five hundred twenty-nine".