39568220672 has 90 divisors (see below), whose sum is σ = 80965223493. Its totient is φ = 19318257664.

The previous prime is 39568220639. The next prime is 39568220677. The reversal of 39568220672 is 27602286593.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 32509532416 + 7058688256 = 180304^2 + 84016^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=140656.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39568220672.

It is not an unprimeable number, because it can be changed into a prime (39568220677) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 265558454 + ... + 265558602.

Almost surely, 2^39568220672 is an apocalyptic number.

39568220672 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39568220672

39568220672 is an abundant number, since it is smaller than the sum of its proper divisors (41397002821).

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

39568220672 is an frugal number, since it uses more digits than its factorization.

39568220672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 50.

Multiplying 39568220672 by its sum of digits (50), we get a square (1978411033600 = 1406560²).

The spelling of 39568220672 in words is "thirty-nine billion, five hundred sixty-eight million, two hundred twenty thousand, six hundred seventy-two".