7637640648 has 32 divisors (see below), whose sum is σ = 20829929760. Its totient is φ = 2314436480.

The previous prime is 7637640623. The next prime is 7637640649. The reversal of 7637640648 is 8460467367.

It is a super-3 number, since 3×7637640648³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7637640648.

It is not an unprimeable number, because it can be changed into a prime (7637640649) 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, 14464965 + ... + 14465492.

It is an arithmetic number, because the mean of its divisors is an integer number (650935305).

Almost surely, 2^7637640648 is an apocalyptic number.

It is an amenable number.

7637640648 is an abundant number, since it is smaller than the sum of its proper divisors (13192289112).

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

7637640648 is a wasteful number, since it uses less digits than its factorization.

7637640648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28930477 (or 28930473 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 51.

The square root of 7637640648 is about 87393.5961498324. The cubic root of 7637640648 is about 1969.3356386200.

The spelling of 7637640648 in words is "seven billion, six hundred thirty-seven million, six hundred forty thousand, six hundred forty-eight".