7991236432 has 10 divisors (see below), whose sum is σ = 15483020618. Its totient is φ = 3995618208.

The previous prime is 7991236411. The next prime is 7991236469. The reversal of 7991236432 is 2346321997.

It can be written as a sum of positive squares in only one way, i.e., 7975204416 + 16032016 = 89304^2 + 4004^2 .

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, 249726123 + ... + 249726154.

Almost surely, 2^7991236432 is an apocalyptic number.

It is an amenable number.

7991236432 is a deficient number, since it is larger than the sum of its proper divisors (7491784186).

7991236432 is a wasteful number, since it uses less digits than its factorization.

7991236432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499452285 (or 499452279 counting only the distinct ones).

The product of its digits is 489888, while the sum is 46.

The square root of 7991236432 is about 89393.7158417749. The cubic root of 7991236432 is about 1999.2694358372.

The spelling of 7991236432 in words is "seven billion, nine hundred ninety-one million, two hundred thirty-six thousand, four hundred thirty-two".