264362772161 has 2 divisors, whose sum is σ = 264362772162. Its totient is φ = 264362772160.

The previous prime is 264362772077. The next prime is 264362772229. The reversal of 264362772161 is 161277263462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155172178561 + 109190593600 = 393919^2 + 330440^2 .

It is a cyclic number.

It is not a de Polignac number, because 264362772161 - 2¹⁸ = 264362510017 is a prime.

It is not a weakly prime, because it can be changed into another prime (264362771161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132181386080 + 132181386081.

It is an arithmetic number, because the mean of its divisors is an integer number (132181386081).

Almost surely, 2^264362772161 is an apocalyptic number.

It is an amenable number.

264362772161 is a deficient number, since it is larger than the sum of its proper divisors (1).

264362772161 is an equidigital number, since it uses as much as digits as its factorization.

264362772161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 47.

The spelling of 264362772161 in words is "two hundred sixty-four billion, three hundred sixty-two million, seven hundred seventy-two thousand, one hundred sixty-one".