7813896964 has 6 divisors (see below), whose sum is σ = 13674319694. Its totient is φ = 3906948480.

The previous prime is 7813896953. The next prime is 7813896989. The reversal of 7813896964 is 4696983187.

It can be written as a sum of positive squares in only one way, i.e., 7074492100 + 739404864 = 84110^2 + 27192^2 .

It is a super-2 number, since 2×7813896964² (a number of 21 digits) contains 22 as substring.

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 as a sum of consecutive naturals, namely, 976737117 + ... + 976737124.

Almost surely, 2^7813896964 is an apocalyptic number.

It is an amenable number.

7813896964 is a deficient number, since it is larger than the sum of its proper divisors (5860422730).

7813896964 is a wasteful number, since it uses less digits than its factorization.

7813896964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953474245 (or 1953474243 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 61.

The square root of 7813896964 is about 88396.2497168291. The cubic root of 7813896964 is about 1984.3695768249.

The spelling of 7813896964 in words is "seven billion, eight hundred thirteen million, eight hundred ninety-six thousand, nine hundred sixty-four".