7926649656 has 128 divisors (see below), whose sum is σ = 20778024960. Its totient is φ = 2517091200.

The previous prime is 7926649571. The next prime is 7926649657. The reversal of 7926649656 is 6569466297.

It is a self number, because there is not a number n which added to its sum of digits gives 7926649656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7926649657) 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 31 ways as a sum of consecutive naturals, for example, 16276245 + ... + 16276731.

It is an arithmetic number, because the mean of its divisors is an integer number (162328320).

Almost surely, 2^7926649656 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 7926649656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10389012480).

7926649656 is an abundant number, since it is smaller than the sum of its proper divisors (12851375304).

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

7926649656 is a wasteful number, since it uses less digits than its factorization.

7926649656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825 (or 821 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 60.

The square root of 7926649656 is about 89031.7339828895. The cubic root of 7926649656 is about 1993.8686940850.

The spelling of 7926649656 in words is "seven billion, nine hundred twenty-six million, six hundred forty-nine thousand, six hundred fifty-six".