7639687636 has 24 divisors (see below), whose sum is σ = 15943697280. Its totient is φ = 3131797152.

The previous prime is 7639687633. The next prime is 7639687661. The reversal of 7639687636 is 6367869367.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7639687631) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5930791 + ... + 5932078.

It is an arithmetic number, because the mean of its divisors is an integer number (664320720).

Almost surely, 2^7639687636 is an apocalyptic number.

It is an amenable number.

7639687636 is an abundant number, since it is smaller than the sum of its proper divisors (8304009644).

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

7639687636 is a wasteful number, since it uses less digits than its factorization.

7639687636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11862903 (or 11862901 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 61.

The square root of 7639687636 is about 87405.3066810019. The cubic root of 7639687636 is about 1969.5115588429.

The spelling of 7639687636 in words is "seven billion, six hundred thirty-nine million, six hundred eighty-seven thousand, six hundred thirty-six".