648864622 has 16 divisors (see below), whose sum is σ = 1123809120. Its totient is φ = 275217408.

The previous prime is 648864617. The next prime is 648864631. The reversal of 648864622 is 226468846.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237547 + ... + 240262.

It is an arithmetic number, because the mean of its divisors is an integer number (70238070).

Almost surely, 2^648864622 is an apocalyptic number.

648864622 is a deficient number, since it is larger than the sum of its proper divisors (474944498).

648864622 is a wasteful number, since it uses less digits than its factorization.

648864622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477915.

The product of its digits is 884736, while the sum is 46.

The square root of 648864622 is about 25472.8212414723. The cubic root of 648864622 is about 865.7344478935.

It can be divided in two parts, 648 and 864622, that added together give a triangular number (865270 = T₁₃₁₅).

The spelling of 648864622 in words is "six hundred forty-eight million, eight hundred sixty-four thousand, six hundred twenty-two".