648005779330 has 32 divisors (see below), whose sum is σ = 1435582036224. Its totient is φ = 205083147456.

The previous prime is 648005779321. The next prime is 648005779331. The reversal of 648005779330 is 33977500846.

It is a happy number.

648005779330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×648005779330² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (648005779331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356046222 + ... + 356048041.

It is an arithmetic number, because the mean of its divisors is an integer number (44861938632).

Almost surely, 2^648005779330 is an apocalyptic number.

648005779330 is an abundant number, since it is smaller than the sum of its proper divisors (787576256894).

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

648005779330 is a wasteful number, since it uses less digits than its factorization.

648005779330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712094290.

The product of its (nonzero) digits is 3810240, while the sum is 52.

The spelling of 648005779330 in words is "six hundred forty-eight billion, five million, seven hundred seventy-nine thousand, three hundred thirty".