542252445409 has 2 divisors, whose sum is σ = 542252445410. Its totient is φ = 542252445408.

The previous prime is 542252445403. The next prime is 542252445421. The reversal of 542252445409 is 904544252245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 529251885009 + 13000560400 = 727497^2 + 114020^2 .

It is a cyclic number.

It is not a de Polignac number, because 542252445409 - 2³⁷ = 404813491937 is a prime.

It is not a weakly prime, because it can be changed into another prime (542252445403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271126222704 + 271126222705.

It is an arithmetic number, because the mean of its divisors is an integer number (271126222705).

Almost surely, 2^542252445409 is an apocalyptic number.

It is an amenable number.

542252445409 is a deficient number, since it is larger than the sum of its proper divisors (1).

542252445409 is an equidigital number, since it uses as much as digits as its factorization.

542252445409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304000, while the sum is 46.

The spelling of 542252445409 in words is "five hundred forty-two billion, two hundred fifty-two million, four hundred forty-five thousand, four hundred nine".