11991176971 has 8 divisors (see below), whose sum is σ = 12295861200. Its totient is φ = 11687074560.

The previous prime is 11991176947. The next prime is 11991176987. The reversal of 11991176971 is 17967119911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11991176971 - 2¹⁹ = 11990652683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11991176941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103561 + ... + 186298.

It is an arithmetic number, because the mean of its divisors is an integer number (1536982650).

Almost surely, 2^11991176971 is an apocalyptic number.

11991176971 is a deficient number, since it is larger than the sum of its proper divisors (304684229).

11991176971 is a wasteful number, since it uses less digits than its factorization.

11991176971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290909.

The product of its digits is 214326, while the sum is 52.

The spelling of 11991176971 in words is "eleven billion, nine hundred ninety-one million, one hundred seventy-six thousand, nine hundred seventy-one".