537681442871209 has 48 divisors (see below), whose sum is σ = 709072426332480. Its totient is φ = 403004001939840.

The previous prime is 537681442871173. The next prime is 537681442871231. The reversal of 537681442871209 is 902178244186735.

It is not a de Polignac number, because 537681442871209 - 2³³ = 537672852936617 is a prime.

It is a super-3 number, since 3×537681442871209³ (a number of 45 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (537681442871009) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 204578347 + ... + 207189919.

It is an arithmetic number, because the mean of its divisors is an integer number (14772342215260).

It is a 1-persistent number, because it is pandigital, but 2⋅537681442871209 = 1075362885742418 is not.

Almost surely, 2^{537681442871209} is an apocalyptic number.

It is an amenable number.

537681442871209 is a deficient number, since it is larger than the sum of its proper divisors (171390983461271).

537681442871209 is a wasteful number, since it uses less digits than its factorization.

537681442871209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2628630 (or 2628623 counting only the distinct ones).

The product of its (nonzero) digits is 162570240, while the sum is 67.

The spelling of 537681442871209 in words is "five hundred thirty-seven trillion, six hundred eighty-one billion, four hundred forty-two million, eight hundred seventy-one thousand, two hundred nine".