545154044142821 has 2 divisors, whose sum is σ = 545154044142822. Its totient is φ = 545154044142820.

The previous prime is 545154044142779. The next prime is 545154044142887. The reversal of 545154044142821 is 128241440451545.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 532221670204900 + 12932373937921 = 23069930^2 + 3596161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545154044142821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 545154044142821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545154044942821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272577022071410 + 272577022071411.

It is an arithmetic number, because the mean of its divisors is an integer number (272577022071411).

Almost surely, 2^{545154044142821} is an apocalyptic number.

It is an amenable number.

545154044142821 is a deficient number, since it is larger than the sum of its proper divisors (1).

545154044142821 is an equidigital number, since it uses as much as digits as its factorization.

545154044142821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4096000, while the sum is 50.

The spelling of 545154044142821 in words is "five hundred forty-five trillion, one hundred fifty-four billion, forty-four million, one hundred forty-two thousand, eight hundred twenty-one".