1145664613 has 4 divisors (see below), whose sum is σ = 1182621568. Its totient is φ = 1108707660.

The previous prime is 1145664601. The next prime is 1145664673. The reversal of 1145664613 is 3164665411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1145664613 - 2⁹ = 1145664101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145664673) 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 3 ways as a sum of consecutive naturals, for example, 18478431 + ... + 18478492.

It is an arithmetic number, because the mean of its divisors is an integer number (295655392).

Almost surely, 2^1145664613 is an apocalyptic number.

It is an amenable number.

1145664613 is a deficient number, since it is larger than the sum of its proper divisors (36956955).

1145664613 is an equidigital number, since it uses as much as digits as its factorization.

1145664613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36956954.

The product of its digits is 51840, while the sum is 37.

The square root of 1145664613 is about 33847.6677630823. The cubic root of 1145664613 is about 1046.3713330383.

The spelling of 1145664613 in words is "one billion, one hundred forty-five million, six hundred sixty-four thousand, six hundred thirteen".