1264065633 has 6 divisors (see below), whose sum is σ = 1825872594. Its totient is φ = 842710416.

The previous prime is 1264065631. The next prime is 1264065637. The reversal of 1264065633 is 3365604621.

1264065633 is a `hidden beast` number, since 1 + 2 + 640 + 6 + 5 + 6 + 3 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1047622689 + 216442944 = 32367^2 + 14712^2 .

It is not a de Polignac number, because 1264065633 - 2¹ = 1264065631 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1264065631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70225860 + ... + 70225877.

It is an arithmetic number, because the mean of its divisors is an integer number (304312099).

Almost surely, 2^1264065633 is an apocalyptic number.

It is an amenable number.

1264065633 is a deficient number, since it is larger than the sum of its proper divisors (561806961).

1264065633 is a wasteful number, since it uses less digits than its factorization.

1264065633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140451743 (or 140451740 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 1264065633 is about 35553.7006934581. The cubic root of 1264065633 is about 1081.2427489551.

The spelling of 1264065633 in words is "one billion, two hundred sixty-four million, sixty-five thousand, six hundred thirty-three".