7811668396 has 36 divisors (see below), whose sum is σ = 15948030000. Its totient is φ = 3338235936.

The previous prime is 7811668373. The next prime is 7811668471. The reversal of 7811668396 is 6938661187.

It is a super-2 number, since 2×7811668396² (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 in 11 ways as a sum of consecutive naturals, for example, 11305 + ... + 125503.

Almost surely, 2^7811668396 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 7811668396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7974015000).

7811668396 is an abundant number, since it is smaller than the sum of its proper divisors (8136361604).

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

7811668396 is a wasteful number, since it uses less digits than its factorization.

7811668396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114566 (or 114557 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 55.

The square root of 7811668396 is about 88383.6432605038. The cubic root of 7811668396 is about 1984.1809077119.

The spelling of 7811668396 in words is "seven billion, eight hundred eleven million, six hundred sixty-eight thousand, three hundred ninety-six".