7991323632 has 60 divisors (see below), whose sum is σ = 22371161904. Its totient is φ = 2662993920.

The previous prime is 7991323631. The next prime is 7991323633. The reversal of 7991323632 is 2363231997.

7991323632 is a `hidden beast` number, since 7 + 9 + 9 + 1 + 3 + 2 + 3 + 632 = 666.

It is an interprime number because it is at equal distance from previous prime (7991323631) and next prime (7991323633).

It is a super-2 number, since 2×7991323632² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7991323631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 695728 + ... + 707120.

Almost surely, 2^7991323632 is an apocalyptic number.

7991323632 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

7991323632 is an abundant number, since it is smaller than the sum of its proper divisors (14379838272).

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

7991323632 is a wasteful number, since it uses less digits than its factorization.

7991323632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16278 (or 16269 counting only the distinct ones).

The product of its digits is 367416, while the sum is 45.

The square root of 7991323632 is about 89394.2035704777. The cubic root of 7991323632 is about 1999.2767077891.

The spelling of 7991323632 in words is "seven billion, nine hundred ninety-one million, three hundred twenty-three thousand, six hundred thirty-two".