7813473664 has 32 divisors (see below), whose sum is σ = 16385167800. Its totient is φ = 3701117952.

The previous prime is 7813473659. The next prime is 7813473743. The reversal of 7813473664 is 4663743187.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×7813473664² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1603957 + ... + 1608820.

Almost surely, 2^7813473664 is an apocalyptic number.

It is an amenable number.

7813473664 is an abundant number, since it is smaller than the sum of its proper divisors (8571694136).

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

7813473664 is a wasteful number, since it uses less digits than its factorization.

7813473664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212810 (or 3212798 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 49.

The square root of 7813473664 is about 88393.8553520549. The cubic root of 7813473664 is about 1984.3337432831. Note that the first 3 decimals are identical.

The spelling of 7813473664 in words is "seven billion, eight hundred thirteen million, four hundred seventy-three thousand, six hundred sixty-four".