1264564673 has 2 divisors, whose sum is σ = 1264564674. Its totient is φ = 1264564672.

The previous prime is 1264564667. The next prime is 1264564723. The reversal of 1264564673 is 3764654621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1259398144 + 5166529 = 35488^2 + 2273^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264564673 - 2²⁰ = 1263516097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1264564643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632282336 + 632282337.

It is an arithmetic number, because the mean of its divisors is an integer number (632282337).

Almost surely, 2^1264564673 is an apocalyptic number.

It is an amenable number.

1264564673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264564673 is an equidigital number, since it uses as much as digits as its factorization.

1264564673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 44.

The square root of 1264564673 is about 35560.7181170459. The cubic root of 1264564673 is about 1081.3850180419.

The spelling of 1264564673 in words is "one billion, two hundred sixty-four million, five hundred sixty-four thousand, six hundred seventy-three".