45543116821 has 2 divisors, whose sum is σ = 45543116822. Its totient is φ = 45543116820.

The previous prime is 45543116819. The next prime is 45543116837. The reversal of 45543116821 is 12861134554.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42357756100 + 3185360721 = 205810^2 + 56439^2 .

It is a cyclic number.

It is not a de Polignac number, because 45543116821 - 2¹ = 45543116819 is a prime.

Together with 45543116819, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45543116881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22771558410 + 22771558411.

It is an arithmetic number, because the mean of its divisors is an integer number (22771558411).

Almost surely, 2^45543116821 is an apocalyptic number.

It is an amenable number.

45543116821 is a deficient number, since it is larger than the sum of its proper divisors (1).

45543116821 is an equidigital number, since it uses as much as digits as its factorization.

45543116821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 115200, while the sum is 40.

The spelling of 45543116821 in words is "forty-five billion, five hundred forty-three million, one hundred sixteen thousand, eight hundred twenty-one".