5645400321 has 12 divisors (see below), whose sum is σ = 8273700176. Its totient is φ = 3421454520.

The previous prime is 5645400281. The next prime is 5645400337. The reversal of 5645400321 is 1230045465.

It is not a de Polignac number, because 5645400321 - 2¹¹ = 5645398273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5645400361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7775671 + ... + 7776396.

Almost surely, 2^5645400321 is an apocalyptic number.

It is an amenable number.

5645400321 is a deficient number, since it is larger than the sum of its proper divisors (2628299855).

5645400321 is a wasteful number, since it uses less digits than its factorization.

5645400321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15552092 (or 15552081 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 5645400321 is about 75135.8790525538. The cubic root of 5645400321 is about 1780.5940365709.

Adding to 5645400321 its reverse (1230045465), we get a palindrome (6875445786).

The spelling of 5645400321 in words is "five billion, six hundred forty-five million, four hundred thousand, three hundred twenty-one".