626622656646 has 128 divisors (see below), whose sum is σ = 1508407971840. Its totient is φ = 169833944448.

The previous prime is 626622656593. The next prime is 626622656669. The reversal of 626622656646 is 646656226626.

626622656646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8808556 + ... + 8879408.

It is an arithmetic number, because the mean of its divisors is an integer number (11784437280).

Almost surely, 2^626622656646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 626622656646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (754203985920).

626622656646 is an abundant number, since it is smaller than the sum of its proper divisors (881785315194).

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

626622656646 is a wasteful number, since it uses less digits than its factorization.

626622656646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71050.

The product of its digits is 44789760, while the sum is 57.

The spelling of 626622656646 in words is "six hundred twenty-six billion, six hundred twenty-two million, six hundred fifty-six thousand, six hundred forty-six".