5601528721 has 4 divisors (see below), whose sum is σ = 5845073472. Its totient is φ = 5357983972.

The previous prime is 5601528701. The next prime is 5601528791. The reversal of 5601528721 is 1278251065.

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 5601528721 - 2⁵ = 5601528689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5601528701) 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, 121772341 + ... + 121772386.

It is an arithmetic number, because the mean of its divisors is an integer number (1461268368).

Almost surely, 2^5601528721 is an apocalyptic number.

It is an amenable number.

5601528721 is a deficient number, since it is larger than the sum of its proper divisors (243544751).

5601528721 is a wasteful number, since it uses less digits than its factorization.

5601528721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243544750.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 5601528721 is about 74843.3612353160. The cubic root of 5601528721 is about 1775.9695789613.

Adding to 5601528721 its reverse (1278251065), we get a palindrome (6879779786).

The spelling of 5601528721 in words is "five billion, six hundred one million, five hundred twenty-eight thousand, seven hundred twenty-one".