7725520541 has 2 divisors, whose sum is σ = 7725520542. Its totient is φ = 7725520540.

The previous prime is 7725520513. The next prime is 7725520549. The reversal of 7725520541 is 1450255277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6145776025 + 1579744516 = 78395^2 + 39746^2 .

It is an emirp because it is prime and its reverse (1450255277) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7725520541 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7725520495 and 7725520504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7725520549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3862760270 + 3862760271.

It is an arithmetic number, because the mean of its divisors is an integer number (3862760271).

Almost surely, 2^7725520541 is an apocalyptic number.

It is an amenable number.

7725520541 is a deficient number, since it is larger than the sum of its proper divisors (1).

7725520541 is an equidigital number, since it uses as much as digits as its factorization.

7725520541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98000, while the sum is 38.

The square root of 7725520541 is about 87894.9403606374. The cubic root of 7725520541 is about 1976.8600148359.

The spelling of 7725520541 in words is "seven billion, seven hundred twenty-five million, five hundred twenty thousand, five hundred forty-one".