537531442565 has 16 divisors (see below), whose sum is σ = 718609676400. Its totient is φ = 383258491392.

The previous prime is 537531442561. The next prime is 537531442639. The reversal of 537531442565 is 565244135735.

It can be written as a sum of positive squares in 8 ways, for example, as 42740187169 + 494791255396 = 206737^2 + 703414^2 .

It is not a de Polignac number, because 537531442565 - 2² = 537531442561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (537531442561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142579400 + ... + 142583169.

It is an arithmetic number, because the mean of its divisors is an integer number (44913104775).

Almost surely, 2^537531442565 is an apocalyptic number.

It is an amenable number.

537531442565 is a deficient number, since it is larger than the sum of its proper divisors (181078233835).

537531442565 is a wasteful number, since it uses less digits than its factorization.

537531442565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285162616.

The product of its digits is 7560000, while the sum is 50.

The spelling of 537531442565 in words is "five hundred thirty-seven billion, five hundred thirty-one million, four hundred forty-two thousand, five hundred sixty-five".