971164644 has 96 divisors (see below), whose sum is σ = 2502057600. Its totient is φ = 291809280.

The previous prime is 971164631. The next prime is 971164669. The reversal of 971164644 is 446461179.

It is a junction number, because it is equal to n+sod(n) for n = 971164596 and 971164605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 821734 + ... + 822914.

It is an arithmetic number, because the mean of its divisors is an integer number (26063100).

Almost surely, 2^971164644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 971164644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1251028800).

971164644 is an abundant number, since it is smaller than the sum of its proper divisors (1530892956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

971164644 is a wasteful number, since it uses less digits than its factorization.

971164644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373 (or 1371 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 971164644 is about 31163.5146284882. The cubic root of 971164644 is about 990.2943191858.

The spelling of 971164644 in words is "nine hundred seventy-one million, one hundred sixty-four thousand, six hundred forty-four".