538575540021 has 224 divisors, whose sum is σ = 896907755520. Its totient is φ = 322248326400.

The previous prime is 538575540017. The next prime is 538575540029. The reversal of 538575540021 is 120045575835.

538575540021 is a `hidden beast` number, since 5 + 3 + 8 + 575 + 54 + 0 + 0 + 21 = 666.

It is not a de Polignac number, because 538575540021 - 2² = 538575540017 is a prime.

It is a super-2 number, since 2×538575540021² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538575540029) 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 223 ways as a sum of consecutive naturals, for example, 2552490606 + ... + 2552490816.

It is an arithmetic number, because the mean of its divisors is an integer number (4004052480).

Almost surely, 2^538575540021 is an apocalyptic number.

It is an amenable number.

538575540021 is a deficient number, since it is larger than the sum of its proper divisors (358332215499).

538575540021 is a wasteful number, since it uses less digits than its factorization.

538575540021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 840000, while the sum is 45.

The spelling of 538575540021 in words is "five hundred thirty-eight billion, five hundred seventy-five million, five hundred forty thousand, twenty-one".