537448805881 has 9 divisors (see below), whose sum is σ = 581981512269. Its totient is φ = 496097792736.

The previous prime is 537448805867. The next prime is 537448805909. The reversal of 537448805881 is 188508844735.

It is a happy number.

The square root of 537448805881 is 733109.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 142084517481 + 395364288400 = 376941^2 + 628780^2 .

It is not a de Polignac number, because 537448805881 - 2⁵ = 537448805849 is a prime.

It is a super-2 number, since 2×537448805881² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (537448805581) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9502221 + ... + 9558613.

Almost surely, 2^537448805881 is an apocalyptic number.

537448805881 is the 733109-th square number.

537448805881 is the 366555-th centered octagonal number.

It is an amenable number.

537448805881 is a deficient number, since it is larger than the sum of its proper divisors (44532706388).

537448805881 is an frugal number, since it uses more digits than its factorization.

537448805881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112812 (or 56406 counting only the distinct ones).

The product of its (nonzero) digits is 34406400, while the sum is 61.

The spelling of 537448805881 in words is "five hundred thirty-seven billion, four hundred forty-eight million, eight hundred five thousand, eight hundred eighty-one".