5601523621 has 2 divisors, whose sum is σ = 5601523622. Its totient is φ = 5601523620.

The previous prime is 5601523619. The next prime is 5601523649. The reversal of 5601523621 is 1263251065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5597134596 + 4389025 = 74814^2 + 2095^2 .

It is a cyclic number.

It is not a de Polignac number, because 5601523621 - 2¹ = 5601523619 is a prime.

Together with 5601523619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5601523601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2800761810 + 2800761811.

It is an arithmetic number, because the mean of its divisors is an integer number (2800761811).

Almost surely, 2^5601523621 is an apocalyptic number.

It is an amenable number.

5601523621 is a deficient number, since it is larger than the sum of its proper divisors (1).

5601523621 is an equidigital number, since it uses as much as digits as its factorization.

5601523621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 5601523621 is about 74843.3271641500. The cubic root of 5601523621 is about 1775.9690399746.

Adding to 5601523621 its reverse (1263251065), we get a palindrome (6864774686).

The spelling of 5601523621 in words is "five billion, six hundred one million, five hundred twenty-three thousand, six hundred twenty-one".