542089787905 has 4 divisors (see below), whose sum is σ = 650507745492. Its totient is φ = 433671830320.

The previous prime is 542089787893. The next prime is 542089787909. The reversal of 542089787905 is 509787980245.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 356017475584 + 186072312321 = 596672^2 + 431361^2 .

It is not a de Polignac number, because 542089787905 - 2²⁵ = 542056233473 is a prime.

It is a super-2 number, since 2×542089787905² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542089787909) 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, 54208978786 + ... + 54208978795.

It is an arithmetic number, because the mean of its divisors is an integer number (162626936373).

Almost surely, 2^542089787905 is an apocalyptic number.

It is an amenable number.

542089787905 is a deficient number, since it is larger than the sum of its proper divisors (108417957587).

542089787905 is a wasteful number, since it uses less digits than its factorization.

542089787905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108417957586.

The product of its (nonzero) digits is 50803200, while the sum is 64.

The spelling of 542089787905 in words is "five hundred forty-two billion, eighty-nine million, seven hundred eighty-seven thousand, nine hundred five".