1264538096449 has 2 divisors, whose sum is σ = 1264538096450. Its totient is φ = 1264538096448.

The previous prime is 1264538096441. The next prime is 1264538096467. The reversal of 1264538096449 is 9446908354621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1062276526224 + 202261570225 = 1030668^2 + 449735^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264538096449 - 2³ = 1264538096441 is a prime.

It is not a weakly prime, because it can be changed into another prime (1264538096441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632269048224 + 632269048225.

It is an arithmetic number, because the mean of its divisors is an integer number (632269048225).

Almost surely, 2^{1264538096449} is an apocalyptic number.

It is an amenable number.

1264538096449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264538096449 is an equidigital number, since it uses as much as digits as its factorization.

1264538096449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44789760, while the sum is 61.

The spelling of 1264538096449 in words is "one trillion, two hundred sixty-four billion, five hundred thirty-eight million, ninety-six thousand, four hundred forty-nine".