864812097761 has 2 divisors, whose sum is σ = 864812097762. Its totient is φ = 864812097760.

The previous prime is 864812097757. The next prime is 864812097767. The reversal of 864812097761 is 167790218468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 864779104225 + 32993536 = 929935^2 + 5744^2 .

It is a cyclic number.

It is not a de Polignac number, because 864812097761 - 2² = 864812097757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 864812097761.

It is not a weakly prime, because it can be changed into another prime (864812097767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432406048880 + 432406048881.

It is an arithmetic number, because the mean of its divisors is an integer number (432406048881).

Almost surely, 2^864812097761 is an apocalyptic number.

It is an amenable number.

864812097761 is a deficient number, since it is larger than the sum of its proper divisors (1).

864812097761 is an equidigital number, since it uses as much as digits as its factorization.

864812097761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8128512, while the sum is 59.

The spelling of 864812097761 in words is "eight hundred sixty-four billion, eight hundred twelve million, ninety-seven thousand, seven hundred sixty-one".