542421201605 has 48 divisors (see below), whose sum is σ = 706000431024. Its totient is φ = 399772938240.

The previous prime is 542421201593. The next prime is 542421201629. The reversal of 542421201605 is 506102124245.

It can be written as a sum of positive squares in 8 ways, for example, as 249054894916 + 293366306689 = 499054^2 + 541633^2 .

It is not a de Polignac number, because 542421201605 - 2²⁸ = 542152766149 is a prime.

It is a super-2 number, since 2×542421201605² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23151857 + ... + 23175273.

It is an arithmetic number, because the mean of its divisors is an integer number (14708342313).

Almost surely, 2^542421201605 is an apocalyptic number.

It is an amenable number.

542421201605 is a deficient number, since it is larger than the sum of its proper divisors (163579229419).

542421201605 is a wasteful number, since it uses less digits than its factorization.

542421201605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23814 (or 23795 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 542421201605 in words is "five hundred forty-two billion, four hundred twenty-one million, two hundred one thousand, six hundred five".