840542069542 has 8 divisors (see below), whose sum is σ = 1440929262096. Its totient is φ = 360232315512.

The previous prime is 840542069513. The next prime is 840542069557. The reversal of 840542069542 is 245960245048.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30019359613 + ... + 30019359640.

It is an arithmetic number, because the mean of its divisors is an integer number (180116157762).

Almost surely, 2^840542069542 is an apocalyptic number.

840542069542 is a deficient number, since it is larger than the sum of its proper divisors (600387192554).

840542069542 is a wasteful number, since it uses less digits than its factorization.

840542069542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60038719262.

The product of its (nonzero) digits is 2764800, while the sum is 49.

The spelling of 840542069542 in words is "eight hundred forty billion, five hundred forty-two million, sixty-nine thousand, five hundred forty-two".