542139605191 has 8 divisors (see below), whose sum is σ = 561213339264. Its totient is φ = 523164956160.

The previous prime is 542139605149. The next prime is 542139605237. The reversal of 542139605191 is 191506931245.

It is a happy number.

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 542139605191 - 2³⁵ = 507779866823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542139605141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24760126 + ... + 24782011.

It is an arithmetic number, because the mean of its divisors is an integer number (70151667408).

Almost surely, 2^542139605191 is an apocalyptic number.

542139605191 is a deficient number, since it is larger than the sum of its proper divisors (19073734073).

542139605191 is a wasteful number, since it uses less digits than its factorization.

542139605191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49542521.

The product of its (nonzero) digits is 291600, while the sum is 46.

The spelling of 542139605191 in words is "five hundred forty-two billion, one hundred thirty-nine million, six hundred five thousand, one hundred ninety-one".