626622656645 has 8 divisors (see below), whose sum is σ = 752015780856. Its totient is φ = 501252396736.

The previous prime is 626622656593. The next prime is 626622656669. The reversal of 626622656645 is 546656226626.

626622656645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 15032966881 + 611589689764 = 122609^2 + 782042^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 626622656645 - 2⁶ = 626622656581 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 5655722 + ... + 5765451.

It is an arithmetic number, because the mean of its divisors is an integer number (94001972607).

Almost surely, 2^626622656645 is an apocalyptic number.

It is an amenable number.

626622656645 is a deficient number, since it is larger than the sum of its proper divisors (125393124211).

626622656645 is a wasteful number, since it uses less digits than its factorization.

626622656645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11432151.

The product of its digits is 37324800, while the sum is 56.

The spelling of 626622656645 in words is "six hundred twenty-six billion, six hundred twenty-two million, six hundred fifty-six thousand, six hundred forty-five".