39643580420 has 12 divisors (see below), whose sum is σ = 83251518924. Its totient is φ = 15857432160.

The previous prime is 39643580419. The next prime is 39643580527. The reversal of 39643580420 is 2408534693.

It can be written as a sum of positive squares in 2 ways, for example, as 8039274244 + 31604306176 = 89662^2 + 177776^2 .

It is a super-2 number, since 2×39643580420² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 991089491 + ... + 991089530.

It is an arithmetic number, because the mean of its divisors is an integer number (6937626577).

Almost surely, 2^39643580420 is an apocalyptic number.

It is an amenable number.

39643580420 is an abundant number, since it is smaller than the sum of its proper divisors (43607938504).

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

39643580420 is a wasteful number, since it uses less digits than its factorization.

39643580420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982179030 (or 1982179028 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 39643580420 in words is "thirty-nine billion, six hundred forty-three million, five hundred eighty thousand, four hundred twenty".