545827796621 has 2 divisors, whose sum is σ = 545827796622. Its totient is φ = 545827796620.

The previous prime is 545827796609. The next prime is 545827796641. The reversal of 545827796621 is 126697728545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316783237225 + 229044559396 = 562835^2 + 478586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545827796621 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545827796641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272913898310 + 272913898311.

It is an arithmetic number, because the mean of its divisors is an integer number (272913898311).

Almost surely, 2^545827796621 is an apocalyptic number.

It is an amenable number.

545827796621 is a deficient number, since it is larger than the sum of its proper divisors (1).

545827796621 is an equidigital number, since it uses as much as digits as its factorization.

545827796621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50803200, while the sum is 62.

The spelling of 545827796621 in words is "five hundred forty-five billion, eight hundred twenty-seven million, seven hundred ninety-six thousand, six hundred twenty-one".