971861926191 has 8 divisors (see below), whose sum is σ = 1395494047920. Its totient is φ = 598068877632.

The previous prime is 971861926171. The next prime is 971861926199. The reversal of 971861926191 is 191629168179.

971861926191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 971861926191 - 2⁹ = 971861925679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971861926199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12459768246 + ... + 12459768323.

It is an arithmetic number, because the mean of its divisors is an integer number (174436755990).

Almost surely, 2^971861926191 is an apocalyptic number.

971861926191 is a deficient number, since it is larger than the sum of its proper divisors (423632121729).

971861926191 is a wasteful number, since it uses less digits than its factorization.

971861926191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24919536585.

The product of its digits is 2939328, while the sum is 60.

The spelling of 971861926191 in words is "nine hundred seventy-one billion, eight hundred sixty-one million, nine hundred twenty-six thousand, one hundred ninety-one".