525445544509 has 2 divisors, whose sum is σ = 525445544510. Its totient is φ = 525445544508.

The previous prime is 525445544453. The next prime is 525445544551. The reversal of 525445544509 is 905445544525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 521558396100 + 3887148409 = 722190^2 + 62347^2 .

It is a cyclic number.

It is not a de Polignac number, because 525445544509 - 2¹⁵ = 525445511741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525445544579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262722772254 + 262722772255.

It is an arithmetic number, because the mean of its divisors is an integer number (262722772255).

Almost surely, 2^525445544509 is an apocalyptic number.

It is an amenable number.

525445544509 is a deficient number, since it is larger than the sum of its proper divisors (1).

525445544509 is an equidigital number, since it uses as much as digits as its factorization.

525445544509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400000, while the sum is 52.

The spelling of 525445544509 in words is "five hundred twenty-five billion, four hundred forty-five million, five hundred forty-four thousand, five hundred nine".