648390956811 has 32 divisors (see below), whose sum is σ = 934499791680. Its totient is φ = 397522128384.

The previous prime is 648390956783. The next prime is 648390956879. The reversal of 648390956811 is 118659093846.

It is not a de Polignac number, because 648390956811 - 2⁵ = 648390956779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648390956881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13280601 + ... + 13329333.

It is an arithmetic number, because the mean of its divisors is an integer number (29203118490).

Almost surely, 2^648390956811 is an apocalyptic number.

648390956811 is a deficient number, since it is larger than the sum of its proper divisors (286108834869).

648390956811 is a wasteful number, since it uses less digits than its factorization.

648390956811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50015.

The product of its (nonzero) digits is 11197440, while the sum is 60.

The spelling of 648390956811 in words is "six hundred forty-eight billion, three hundred ninety million, nine hundred fifty-six thousand, eight hundred eleven".