7921688996 has 12 divisors (see below), whose sum is σ = 14929337052. Its totient is φ = 3656164128.

The previous prime is 7921688977. The next prime is 7921689023. The reversal of 7921688996 is 6998861297.

It can be written as a sum of positive squares in 2 ways, for example, as 4171351396 + 3750337600 = 64586^2 + 61240^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76170035 + ... + 76170138.

It is an arithmetic number, because the mean of its divisors is an integer number (1244111421).

Almost surely, 2^7921688996 is an apocalyptic number.

It is an amenable number.

7921688996 is a deficient number, since it is larger than the sum of its proper divisors (7007648056).

7921688996 is a wasteful number, since it uses less digits than its factorization.

7921688996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152340190 (or 152340188 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 65.

The square root of 7921688996 is about 89003.8706798755. The cubic root of 7921688996 is about 1993.4526726412.

The spelling of 7921688996 in words is "seven billion, nine hundred twenty-one million, six hundred eighty-eight thousand, nine hundred ninety-six".