538865373243 has 16 divisors (see below), whose sum is σ = 720877426976. Its totient is φ = 358048753920.

The previous prime is 538865373209. The next prime is 538865373257. The reversal of 538865373243 is 342373568835.

It is a happy number.

It is not a de Polignac number, because 538865373243 - 2³² = 534570405947 is a prime.

It is a super-3 number, since 3×538865373243³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538865373283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8024121 + ... + 8090997.

It is an arithmetic number, because the mean of its divisors is an integer number (45054839186).

Almost surely, 2^538865373243 is an apocalyptic number.

538865373243 is a deficient number, since it is larger than the sum of its proper divisors (182012053733).

538865373243 is a wasteful number, since it uses less digits than its factorization.

538865373243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75774.

The product of its digits is 43545600, while the sum is 57.

The spelling of 538865373243 in words is "five hundred thirty-eight billion, eight hundred sixty-five million, three hundred seventy-three thousand, two hundred forty-three".