7982643654 has 96 divisors (see below), whose sum is σ = 18580783104. Its totient is φ = 2472275520.

The previous prime is 7982643593. The next prime is 7982643661. The reversal of 7982643654 is 4563462897.

It is a self number, because there is not a number n which added to its sum of digits gives 7982643654.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1387107 + ... + 1392849.

It is an arithmetic number, because the mean of its divisors is an integer number (193549824).

Almost surely, 2^7982643654 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7982643654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9290391552).

7982643654 is an abundant number, since it is smaller than the sum of its proper divisors (10598139450).

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

7982643654 is a wasteful number, since it uses less digits than its factorization.

7982643654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5882 (or 5879 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The square root of 7982643654 is about 89345.6414941434. The cubic root of 7982643654 is about 1998.5525905890.

The spelling of 7982643654 in words is "seven billion, nine hundred eighty-two million, six hundred forty-three thousand, six hundred fifty-four".