626465664 has 192 divisors, whose sum is σ = 2040554880. Its totient is φ = 189734400.

The previous prime is 626465647. The next prime is 626465677. The reversal of 626465664 is 466564626.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 341229 + ... + 343059.

It is an arithmetic number, because the mean of its divisors is an integer number (10627890).

Almost surely, 2^626465664 is an apocalyptic number.

626465664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 626465664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1020277440).

626465664 is an abundant number, since it is smaller than the sum of its proper divisors (1414089216).

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

626465664 is a wasteful number, since it uses less digits than its factorization.

626465664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1871 (or 1847 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 45.

The square root of 626465664 is about 25029.2961147532. The cubic root of 626465664 is about 855.6557849730.

The spelling of 626465664 in words is "six hundred twenty-six million, four hundred sixty-five thousand, six hundred sixty-four".