8211807964 has 6 divisors (see below), whose sum is σ = 14370663944. Its totient is φ = 4105903980.

The previous prime is 8211807949. The next prime is 8211808021. The reversal of 8211807964 is 4697081128.

It is a super-2 number, since 2×8211807964² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1026475992 + ... + 1026475999.

Almost surely, 2^8211807964 is an apocalyptic number.

It is an amenable number.

8211807964 is a deficient number, since it is larger than the sum of its proper divisors (6158855980).

8211807964 is a wasteful number, since it uses less digits than its factorization.

8211807964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052951995 (or 2052951993 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 8211807964 is about 90619.0265010610. The cubic root of 8211807964 is about 2017.4971422769.

The spelling of 8211807964 in words is "eight billion, two hundred eleven million, eight hundred seven thousand, nine hundred sixty-four".