648442467948 has 48 divisors (see below), whose sum is σ = 1651733145216. Its totient is φ = 196360536960.

The previous prime is 648442467943. The next prime is 648442467949. The reversal of 648442467948 is 849764244846.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is not an unprimeable number, because it can be changed into a prime (648442467943) 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 15 ways as a sum of consecutive naturals, for example, 1524886 + ... + 1903197.

It is an arithmetic number, because the mean of its divisors is an integer number (34411107192).

Almost surely, 2^648442467948 is an apocalyptic number.

It is an amenable number.

648442467948 is an abundant number, since it is smaller than the sum of its proper divisors (1003290677268).

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

648442467948 is a wasteful number, since it uses less digits than its factorization.

648442467948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3429534 (or 3429532 counting only the distinct ones).

The product of its digits is 297271296, while the sum is 66.

The spelling of 648442467948 in words is "six hundred forty-eight billion, four hundred forty-two million, four hundred sixty-seven thousand, nine hundred forty-eight".