525442047566405 has 4 divisors (see below), whose sum is σ = 630530457079692. Its totient is φ = 420353638053120.

The previous prime is 525442047566357. The next prime is 525442047566407. The reversal of 525442047566405 is 504665740244525.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 276034000861441 + 249408046704964 = 16614271^2 + 15792658^2 .

It is not a de Polignac number, because 525442047566405 - 2¹² = 525442047562309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525442047566407) 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, 52544204756636 + ... + 52544204756645.

It is an arithmetic number, because the mean of its divisors is an integer number (157632614269923).

Almost surely, 2^{525442047566405} is an apocalyptic number.

It is an amenable number.

525442047566405 is a deficient number, since it is larger than the sum of its proper divisors (105088409513287).

525442047566405 is a wasteful number, since it uses less digits than its factorization.

525442047566405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105088409513286.

The product of its (nonzero) digits is 161280000, while the sum is 59.

The spelling of 525442047566405 in words is "five hundred twenty-five trillion, four hundred forty-two billion, forty-seven million, five hundred sixty-six thousand, four hundred five".