320105208657 has 16 divisors (see below), whose sum is σ = 459692629760. Its totient is φ = 196964514432.

The previous prime is 320105208629. The next prime is 320105208679. The reversal of 320105208657 is 756802501023.

It is not a de Polignac number, because 320105208657 - 2²⁴ = 320088431441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (320105208607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148732 + ... + 813837.

It is an arithmetic number, because the mean of its divisors is an integer number (28730789360).

Almost surely, 2^320105208657 is an apocalyptic number.

It is an amenable number.

320105208657 is a deficient number, since it is larger than the sum of its proper divisors (139587421103).

320105208657 is a wasteful number, since it uses less digits than its factorization.

320105208657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971112.

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 320105208657 in words is "three hundred twenty billion, one hundred five million, two hundred eight thousand, six hundred fifty-seven".