626641064 has 64 divisors (see below), whose sum is σ = 1379495040. Its totient is φ = 261273600.

The previous prime is 626641061. The next prime is 626641073. The reversal of 626641064 is 460146626.

It is not an unprimeable number, because it can be changed into a prime (626641061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1042364 + ... + 1042964.

It is an arithmetic number, because the mean of its divisors is an integer number (21554610).

Almost surely, 2^626641064 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 626641064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (689747520).

626641064 is an abundant number, since it is smaller than the sum of its proper divisors (752853976).

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

626641064 is a wasteful number, since it uses less digits than its factorization.

626641064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090 (or 1086 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 626641064 is about 25032.7997635103. The cubic root of 626641064 is about 855.7356339994.

The spelling of 626641064 in words is "six hundred twenty-six million, six hundred forty-one thousand, sixty-four".