542563021921 has 8 divisors (see below), whose sum is σ = 542935860480. Its totient is φ = 542190317088.

The previous prime is 542563021919. The next prime is 542563021939. The reversal of 542563021921 is 129120365245.

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 542563021921 - 2¹ = 542563021919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542563021951) 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, 8880540 + ... + 8941426.

It is an arithmetic number, because the mean of its divisors is an integer number (67866982560).

Almost surely, 2^542563021921 is an apocalyptic number.

It is an amenable number.

542563021921 is a deficient number, since it is larger than the sum of its proper divisors (372838559).

542563021921 is a wasteful number, since it uses less digits than its factorization.

542563021921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66863.

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

The spelling of 542563021921 in words is "five hundred forty-two billion, five hundred sixty-three million, twenty-one thousand, nine hundred twenty-one".