648005779332 has 72 divisors (see below), whose sum is σ = 1645550786880. Its totient is φ = 215009208000.

The previous prime is 648005779331. The next prime is 648005779439. The reversal of 648005779332 is 233977500846.

648005779332 is a `hidden beast` number, since 6 + 480 + 0 + 5 + 77 + 93 + 3 + 2 = 666.

648005779332 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×648005779332² (a number of 24 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 15276769 + ... + 15319127.

It is an arithmetic number, because the mean of its divisors is an integer number (22854872040).

Almost surely, 2^648005779332 is an apocalyptic number.

It is an amenable number.

648005779332 is an abundant number, since it is smaller than the sum of its proper divisors (997545007548).

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

648005779332 is a wasteful number, since it uses less digits than its factorization.

648005779332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44313 (or 44308 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 54.

The spelling of 648005779332 in words is "six hundred forty-eight billion, five million, seven hundred seventy-nine thousand, three hundred thirty-two".