1645230263 has 4 divisors (see below), whose sum is σ = 1658184960. Its totient is φ = 1632275568.

The previous prime is 1645230239. The next prime is 1645230287. The reversal of 1645230263 is 3620325461.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1645230239) and next prime (1645230287).

It is a cyclic number.

It is not a de Polignac number, because 1645230263 - 2¹⁰ = 1645229239 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 (1645230563) 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, 6477158 + ... + 6477411.

It is an arithmetic number, because the mean of its divisors is an integer number (414546240).

Almost surely, 2^1645230263 is an apocalyptic number.

1645230263 is a deficient number, since it is larger than the sum of its proper divisors (12954697).

1645230263 is a wasteful number, since it uses less digits than its factorization.

1645230263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12954696.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 1645230263 is about 40561.4381278574. The cubic root of 1645230263 is about 1180.5260182308.

The spelling of 1645230263 in words is "one billion, six hundred forty-five million, two hundred thirty thousand, two hundred sixty-three".