538713145831 has 4 divisors (see below), whose sum is σ = 615672166672. Its totient is φ = 461754124992.

The previous prime is 538713145793. The next prime is 538713145849. The reversal of 538713145831 is 138541317835.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138541317835 = 5 ⋅27708263567.

It is a cyclic number.

It is not a de Polignac number, because 538713145831 - 2⁷ = 538713145703 is a prime.

It is a super-2 number, since 2×538713145831² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538713143831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38479510410 + ... + 38479510423.

It is an arithmetic number, because the mean of its divisors is an integer number (153918041668).

Almost surely, 2^538713145831 is an apocalyptic number.

538713145831 is a deficient number, since it is larger than the sum of its proper divisors (76959020841).

538713145831 is an equidigital number, since it uses as much as digits as its factorization.

538713145831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76959020840.

The product of its digits is 1209600, while the sum is 49.

The spelling of 538713145831 in words is "five hundred thirty-eight billion, seven hundred thirteen million, one hundred forty-five thousand, eight hundred thirty-one".