542191213539 has 16 divisors (see below), whose sum is σ = 804824349600. Its totient is φ = 360750660768.

The previous prime is 542191213511. The next prime is 542191213561. The reversal of 542191213539 is 935312191245.

542191213539 is a `hidden beast` number, since 5 + 4 + 2 + 1 + 91 + 21 + 3 + 539 = 666.

It is not a de Polignac number, because 542191213539 - 2¹¹ = 542191211491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 542191213494 and 542191213503.

It is not an unprimeable number, because it can be changed into a prime (542191213139) 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, 19712344 + ... + 19739829.

It is an arithmetic number, because the mean of its divisors is an integer number (50301521850).

Almost surely, 2^542191213539 is an apocalyptic number.

542191213539 is a deficient number, since it is larger than the sum of its proper divisors (262633136061).

542191213539 is a wasteful number, since it uses less digits than its factorization.

542191213539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39452691 (or 39452685 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The spelling of 542191213539 in words is "five hundred forty-two billion, one hundred ninety-one million, two hundred thirteen thousand, five hundred thirty-nine".