626990827648 has 64 divisors (see below), whose sum is σ = 1275862048920. Its totient is φ = 306804326400.

The previous prime is 626990827633. The next prime is 626990827703. The reversal of 626990827648 is 846728099626.

It can be written as a sum of positive squares in 4 ways, for example, as 620805319744 + 6185507904 = 787912^2 + 78648^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2576848 + ... + 2809648.

Almost surely, 2^626990827648 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 626990827648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (637931024460).

626990827648 is an abundant number, since it is smaller than the sum of its proper divisors (648871221272).

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

626990827648 is a wasteful number, since it uses less digits than its factorization.

626990827648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233265 (or 233253 counting only the distinct ones).

The product of its (nonzero) digits is 125411328, while the sum is 67.

The spelling of 626990827648 in words is "six hundred twenty-six billion, nine hundred ninety million, eight hundred twenty-seven thousand, six hundred forty-eight".