648661976522 has 32 divisors (see below), whose sum is σ = 1121602522752. Its totient is φ = 275603350464.

The previous prime is 648661976519. The next prime is 648661976537. The reversal of 648661976522 is 225679166846.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 15 ways as a sum of consecutive naturals, for example, 640628 + ... + 1306800.

It is an arithmetic number, because the mean of its divisors is an integer number (35050078836).

Almost surely, 2^648661976522 is an apocalyptic number.

648661976522 is a deficient number, since it is larger than the sum of its proper divisors (472940546230).

648661976522 is a wasteful number, since it uses less digits than its factorization.

648661976522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666782.

The product of its digits is 52254720, while the sum is 62.

The spelling of 648661976522 in words is "six hundred forty-eight billion, six hundred sixty-one million, nine hundred seventy-six thousand, five hundred twenty-two".