538006521613 has 4 divisors (see below), whose sum is σ = 586916205408. Its totient is φ = 489096837820.

The previous prime is 538006521607. The next prime is 538006521629. The reversal of 538006521613 is 316125600835.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 538006521613 - 2⁵ = 538006521581 is a prime.

It is a super-2 number, since 2×538006521613² (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 (538006521673) 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, 24454841881 + ... + 24454841902.

It is an arithmetic number, because the mean of its divisors is an integer number (146729051352).

Almost surely, 2^538006521613 is an apocalyptic number.

It is an amenable number.

538006521613 is a deficient number, since it is larger than the sum of its proper divisors (48909683795).

538006521613 is a wasteful number, since it uses less digits than its factorization.

538006521613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48909683794.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 538006521613 in words is "five hundred thirty-eight billion, six million, five hundred twenty-one thousand, six hundred thirteen".