7638989568 has 144 divisors (see below), whose sum is σ = 23322007296. Its totient is φ = 2174423040.

The previous prime is 7638989521. The next prime is 7638989573. The reversal of 7638989568 is 8659898367.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1518898 + ... + 1523918.

It is an arithmetic number, because the mean of its divisors is an integer number (161958384).

Almost surely, 2^7638989568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7638989568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11661003648).

7638989568 is an abundant number, since it is smaller than the sum of its proper divisors (15683017728).

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

7638989568 is a wasteful number, since it uses less digits than its factorization.

7638989568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5330 (or 5316 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 69.

The square root of 7638989568 is about 87401.3133082106. The cubic root of 7638989568 is about 1969.4515697029.

The spelling of 7638989568 in words is "seven billion, six hundred thirty-eight million, nine hundred eighty-nine thousand, five hundred sixty-eight".