538840265865 has 32 divisors (see below), whose sum is σ = 953405064576. Its totient is φ = 257677032960.

The previous prime is 538840265863. The next prime is 538840265897. The reversal of 538840265865 is 568562048835.

It is a happy number.

It is not a de Polignac number, because 538840265865 - 2¹ = 538840265863 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 538840265799 and 538840265808.

It is not an unprimeable number, because it can be changed into a prime (538840265863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22355754 + ... + 22379843.

It is an arithmetic number, because the mean of its divisors is an integer number (29793908268).

Almost surely, 2^538840265865 is an apocalyptic number.

538840265865 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

538840265865 is a deficient number, since it is larger than the sum of its proper divisors (414564798711).

538840265865 is a wasteful number, since it uses less digits than its factorization.

538840265865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44735689.

The product of its (nonzero) digits is 55296000, while the sum is 60.

The spelling of 538840265865 in words is "five hundred thirty-eight billion, eight hundred forty million, two hundred sixty-five thousand, eight hundred sixty-five".