4365725521 has 2 divisors, whose sum is σ = 4365725522. Its totient is φ = 4365725520.

The previous prime is 4365725503. The next prime is 4365725527. The reversal of 4365725521 is 1255275634.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4324509121 + 41216400 = 65761^2 + 6420^2 .

It is a cyclic number.

It is not a de Polignac number, because 4365725521 - 2⁵ = 4365725489 is a prime.

It is not a weakly prime, because it can be changed into another prime (4365725527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2182862760 + 2182862761.

It is an arithmetic number, because the mean of its divisors is an integer number (2182862761).

Almost surely, 2^4365725521 is an apocalyptic number.

It is an amenable number.

4365725521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4365725521 is an equidigital number, since it uses as much as digits as its factorization.

4365725521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252000, while the sum is 40.

The square root of 4365725521 is about 66073.6371104240. The cubic root of 4365725521 is about 1634.3766256339.

The spelling of 4365725521 in words is "four billion, three hundred sixty-five million, seven hundred twenty-five thousand, five hundred twenty-one".