867312381068321 has 2 divisors, whose sum is σ = 867312381068322. Its totient is φ = 867312381068320.

The previous prime is 867312381068311. The next prime is 867312381068347. The reversal of 867312381068321 is 123860183213768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 477076851883921 + 390235529184400 = 21842089^2 + 19754380^2 .

It is a cyclic number.

It is not a de Polignac number, because 867312381068321 - 2²² = 867312376874017 is a prime.

It is not a weakly prime, because it can be changed into another prime (867312381068311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433656190534160 + 433656190534161.

It is an arithmetic number, because the mean of its divisors is an integer number (433656190534161).

Almost surely, 2^{867312381068321} is an apocalyptic number.

It is an amenable number.

867312381068321 is a deficient number, since it is larger than the sum of its proper divisors (1).

867312381068321 is an equidigital number, since it uses as much as digits as its factorization.

867312381068321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13934592, while the sum is 59.

The spelling of 867312381068321 in words is "eight hundred sixty-seven trillion, three hundred twelve billion, three hundred eighty-one million, sixty-eight thousand, three hundred twenty-one".