546243515021 has 4 divisors (see below), whose sum is σ = 553726302972. Its totient is φ = 538760727072.

The previous prime is 546243515011. The next prime is 546243515023. The reversal of 546243515021 is 120515342645.

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 362541268996 + 183702246025 = 602114^2 + 428605^2 .

It is a cyclic number.

It is not a de Polignac number, because 546243515021 - 2³⁴ = 529063645837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (546243515023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3741393866 + ... + 3741394011.

It is an arithmetic number, because the mean of its divisors is an integer number (138431575743).

Almost surely, 2^546243515021 is an apocalyptic number.

It is an amenable number.

546243515021 is a deficient number, since it is larger than the sum of its proper divisors (7482787951).

546243515021 is an equidigital number, since it uses as much as digits as its factorization.

546243515021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7482787950.

The product of its (nonzero) digits is 144000, while the sum is 38.

Adding to 546243515021 its reverse (120515342645), we get a palindrome (666758857666).

The spelling of 546243515021 in words is "five hundred forty-six billion, two hundred forty-three million, five hundred fifteen thousand, twenty-one".