542788342921 has 4 divisors (see below), whose sum is σ = 592132737744. Its totient is φ = 493443948100.

The previous prime is 542788342907. The next prime is 542788342949. The reversal of 542788342921 is 129243887245.

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 542788342921 - 2¹⁹ = 542787818633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542788342981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24672197395 + ... + 24672197416.

It is an arithmetic number, because the mean of its divisors is an integer number (148033184436).

Almost surely, 2^542788342921 is an apocalyptic number.

It is an amenable number.

542788342921 is a deficient number, since it is larger than the sum of its proper divisors (49344394823).

542788342921 is a wasteful number, since it uses less digits than its factorization.

542788342921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49344394822.

The product of its digits is 7741440, while the sum is 55.

The spelling of 542788342921 in words is "five hundred forty-two billion, seven hundred eighty-eight million, three hundred forty-two thousand, nine hundred twenty-one".