5645570321 has 4 divisors (see below), whose sum is σ = 5677110000. Its totient is φ = 5614030644.

The previous prime is 5645570309. The next prime is 5645570327. The reversal of 5645570321 is 1230755465.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1230755465 = 5 ⋅246151093.

It is a cyclic number.

It is not a de Polignac number, because 5645570321 - 2¹⁰ = 5645569297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5645570327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15769571 + ... + 15769928.

It is an arithmetic number, because the mean of its divisors is an integer number (1419277500).

Almost surely, 2^5645570321 is an apocalyptic number.

It is an amenable number.

5645570321 is a deficient number, since it is larger than the sum of its proper divisors (31539679).

5645570321 is a wasteful number, since it uses less digits than its factorization.

5645570321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31539678.

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 5645570321 is about 75137.0103278005. The cubic root of 5645570321 is about 1780.6119094073.

The spelling of 5645570321 in words is "five billion, six hundred forty-five million, five hundred seventy thousand, three hundred twenty-one".