4001564321 has 4 divisors (see below), whose sum is σ = 4025525952. Its totient is φ = 3977602692.

The previous prime is 4001564299. The next prime is 4001564323. The reversal of 4001564321 is 1234651004.

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 4001564321 - 2²² = 3997370017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4001564323) 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, 11980565 + ... + 11980898.

It is an arithmetic number, because the mean of its divisors is an integer number (1006381488).

Almost surely, 2^4001564321 is an apocalyptic number.

It is an amenable number.

4001564321 is a deficient number, since it is larger than the sum of its proper divisors (23961631).

4001564321 is a wasteful number, since it uses less digits than its factorization.

4001564321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23961630.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 4001564321 is about 63257.9190378564. The cubic root of 4001564321 is about 1587.6079587316.

The spelling of 4001564321 in words is "four billion, one million, five hundred sixty-four thousand, three hundred twenty-one".