320566553464646 has 16 divisors (see below), whose sum is σ = 481151153837376. Its totient is φ = 160182837888936.

The previous prime is 320566553464643. The next prime is 320566553464691. The reversal of 320566553464646 is 646464355665023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320566553464643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292661525 + ... + 293754831.

It is an arithmetic number, because the mean of its divisors is an integer number (30071947114836).

Almost surely, 2^{320566553464646} is an apocalyptic number.

320566553464646 is a deficient number, since it is larger than the sum of its proper divisors (160584600372730).

320566553464646 is a wasteful number, since it uses less digits than its factorization.

320566553464646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185043.

The product of its (nonzero) digits is 1119744000, while the sum is 65.

The spelling of 320566553464646 in words is "three hundred twenty trillion, five hundred sixty-six billion, five hundred fifty-three million, four hundred sixty-four thousand, six hundred forty-six".