320818300397 has 12 divisors (see below), whose sum is σ = 373215191580. Its totient is φ = 274973561856.

The previous prime is 320818300379. The next prime is 320818300567. The reversal of 320818300397 is 793003818023.

It can be written as a sum of positive squares in 2 ways, for example, as 309559817161 + 11258483236 = 556381^2 + 106106^2 .

It is not a de Polignac number, because 320818300397 - 2⁶ = 320818300333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320818300307) 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 11 ways as a sum of consecutive naturals, for example, 915629 + ... + 1216557.

It is an arithmetic number, because the mean of its divisors is an integer number (31101265965).

Almost surely, 2^320818300397 is an apocalyptic number.

It is an amenable number.

320818300397 is a deficient number, since it is larger than the sum of its proper divisors (52396891183).

320818300397 is a wasteful number, since it uses less digits than its factorization.

320818300397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322700 (or 322693 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 320818300397 in words is "three hundred twenty billion, eight hundred eighteen million, three hundred thousand, three hundred ninety-seven".