648005779416 has 32 divisors (see below), whose sum is σ = 1620167016960. Its totient is φ = 215981584032.

The previous prime is 648005779331. The next prime is 648005779439. The reversal of 648005779416 is 614977500846.

It is a super-2 number, since 2×648005779416² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1010160 + ... + 1521983.

It is an arithmetic number, because the mean of its divisors is an integer number (50630219280).

Almost surely, 2^648005779416 is an apocalyptic number.

It is an amenable number.

648005779416 is an abundant number, since it is smaller than the sum of its proper divisors (972161237544).

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

648005779416 is a wasteful number, since it uses less digits than its factorization.

648005779416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2542815 (or 2542811 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 57.

The spelling of 648005779416 in words is "six hundred forty-eight billion, five million, seven hundred seventy-nine thousand, four hundred sixteen".