971591362571 has 2 divisors, whose sum is σ = 971591362572. Its totient is φ = 971591362570.

The previous prime is 971591362549. The next prime is 971591362601. The reversal of 971591362571 is 175263195179.

It is a happy number.

971591362571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-971591362571 is a prime.

It is not a weakly prime, because it can be changed into another prime (971591362531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485795681285 + 485795681286.

It is an arithmetic number, because the mean of its divisors is an integer number (485795681286).

Almost surely, 2^971591362571 is an apocalyptic number.

971591362571 is a deficient number, since it is larger than the sum of its proper divisors (1).

971591362571 is an equidigital number, since it uses as much as digits as its factorization.

971591362571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3572100, while the sum is 56.

The spelling of 971591362571 in words is "nine hundred seventy-one billion, five hundred ninety-one million, three hundred sixty-two thousand, five hundred seventy-one".