1264340141161 has 2 divisors, whose sum is σ = 1264340141162. Its totient is φ = 1264340141160.

The previous prime is 1264340141137. The next prime is 1264340141173. The reversal of 1264340141161 is 1611410434621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 658441365136 + 605898776025 = 811444^2 + 778395^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264340141161 - 2¹⁵ = 1264340108393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1264340141111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632170070580 + 632170070581.

It is an arithmetic number, because the mean of its divisors is an integer number (632170070581).

Almost surely, 2^{1264340141161} is an apocalyptic number.

It is an amenable number.

1264340141161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264340141161 is an equidigital number, since it uses as much as digits as its factorization.

1264340141161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

Adding to 1264340141161 its reverse (1611410434621), we get a palindrome (2875750575782).

The spelling of 1264340141161 in words is "one trillion, two hundred sixty-four billion, three hundred forty million, one hundred forty-one thousand, one hundred sixty-one".