648045762078 has 128 divisors (see below), whose sum is σ = 1542513176064. Its totient is φ = 178914816000.

The previous prime is 648045762061. The next prime is 648045762079. The reversal of 648045762078 is 870267540846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648045762079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 85524226 + ... + 85531802.

It is an arithmetic number, because the mean of its divisors is an integer number (12050884188).

Almost surely, 2^648045762078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648045762078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (771256588032).

648045762078 is an abundant number, since it is smaller than the sum of its proper divisors (894467413986).

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

648045762078 is a wasteful number, since it uses less digits than its factorization.

648045762078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8890.

The product of its (nonzero) digits is 18063360, while the sum is 57.

The spelling of 648045762078 in words is "six hundred forty-eight billion, forty-five million, seven hundred sixty-two thousand, seventy-eight".