640108306148 has 12 divisors (see below), whose sum is σ = 1158816761340. Its totient is φ = 309017802912.

The previous prime is 640108306139. The next prime is 640108306153. The reversal of 640108306148 is 841603801046.

640108306148 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 384191708224 + 255916597924 = 619832^2 + 505882^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2759087411 + ... + 2759087642.

It is an arithmetic number, because the mean of its divisors is an integer number (96568063445).

Almost surely, 2^640108306148 is an apocalyptic number.

It is an amenable number.

640108306148 is a deficient number, since it is larger than the sum of its proper divisors (518708455192).

640108306148 is a wasteful number, since it uses less digits than its factorization.

640108306148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5518175086 (or 5518175084 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 640108306148 in words is "six hundred forty billion, one hundred eight million, three hundred six thousand, one hundred forty-eight".