538820858681 has 8 divisors (see below), whose sum is σ = 615969889920. Its totient is φ = 461715483168.

The previous prime is 538820858671. The next prime is 538820858699. The reversal of 538820858681 is 186858028835.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 538820858681 - 2¹⁴ = 538820842297 is a prime.

It is a super-2 number, since 2×538820858681² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (538820858671) 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 7 ways as a sum of consecutive naturals, for example, 10887476 + ... + 10936853.

It is an arithmetic number, because the mean of its divisors is an integer number (76996236240).

Almost surely, 2^538820858681 is an apocalyptic number.

It is an amenable number.

538820858681 is a deficient number, since it is larger than the sum of its proper divisors (77149031239).

538820858681 is a wasteful number, since it uses less digits than its factorization.

538820858681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21827863.

The product of its (nonzero) digits is 29491200, while the sum is 62.

The spelling of 538820858681 in words is "five hundred thirty-eight billion, eight hundred twenty million, eight hundred fifty-eight thousand, six hundred eighty-one".