1264113643 has 8 divisors (see below), whose sum is σ = 1433003600. Its totient is φ = 1105459488.

The previous prime is 1264113637. The next prime is 1264113647. The reversal of 1264113643 is 3463114621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1264113643 - 2⁵ = 1264113611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264113647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2558688 + ... + 2559181.

It is an arithmetic number, because the mean of its divisors is an integer number (179125450).

Almost surely, 2^1264113643 is an apocalyptic number.

1264113643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1264113643 is a deficient number, since it is larger than the sum of its proper divisors (168889957).

1264113643 is a wasteful number, since it uses less digits than its factorization.

1264113643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5117901.

The product of its digits is 10368, while the sum is 31.

The square root of 1264113643 is about 35554.3758628949. The cubic root of 1264113643 is about 1081.2564375395.

The spelling of 1264113643 in words is "one billion, two hundred sixty-four million, one hundred thirteen thousand, six hundred forty-three".