542730721515 has 16 divisors (see below), whose sum is σ = 871108496928. Its totient is φ = 288543270656.

The previous prime is 542730721501. The next prime is 542730721549. The reversal of 542730721515 is 515127037245.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 542730721515 - 2¹⁶ = 542730655979 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57064722 + ... + 57074231.

It is an arithmetic number, because the mean of its divisors is an integer number (54444281058).

Almost surely, 2^542730721515 is an apocalyptic number.

542730721515 is a deficient number, since it is larger than the sum of its proper divisors (328377775413).

542730721515 is a wasteful number, since it uses less digits than its factorization.

542730721515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114139278.

The product of its (nonzero) digits is 294000, while the sum is 42.

The spelling of 542730721515 in words is "five hundred forty-two billion, seven hundred thirty million, seven hundred twenty-one thousand, five hundred fifteen".