1264545563 has 2 divisors, whose sum is σ = 1264545564. Its totient is φ = 1264545562.

The previous prime is 1264545547. The next prime is 1264545631. The reversal of 1264545563 is 3655454621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1264545563 - 2⁴ = 1264545547 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1264545563.

It is not a weakly prime, because it can be changed into another prime (1264535563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632272781 + 632272782.

It is an arithmetic number, because the mean of its divisors is an integer number (632272782).

Almost surely, 2^1264545563 is an apocalyptic number.

1264545563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264545563 is an equidigital number, since it uses as much as digits as its factorization.

1264545563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432000, while the sum is 41.

The square root of 1264545563 is about 35560.4494206696. The cubic root of 1264545563 is about 1081.3795707466.

The spelling of 1264545563 in words is "one billion, two hundred sixty-four million, five hundred forty-five thousand, five hundred sixty-three".