542240251665 has 24 divisors (see below), whose sum is σ = 1009230837120. Its totient is φ = 247881257568.

The previous prime is 542240251583. The next prime is 542240251711. The reversal of 542240251665 is 566152042245.

It is a happy number.

It is not a de Polignac number, because 542240251665 - 2¹⁴ = 542240235281 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 368870185 + ... + 368871654.

It is an arithmetic number, because the mean of its divisors is an integer number (42051284880).

Almost surely, 2^542240251665 is an apocalyptic number.

It is an amenable number.

542240251665 is a deficient number, since it is larger than the sum of its proper divisors (466990585455).

542240251665 is a wasteful number, since it uses less digits than its factorization.

542240251665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737741861 (or 737741854 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 42.

The spelling of 542240251665 in words is "five hundred forty-two billion, two hundred forty million, two hundred fifty-one thousand, six hundred sixty-five".