53346746821 has 2 divisors, whose sum is σ = 53346746822. Its totient is φ = 53346746820.

The previous prime is 53346746777. The next prime is 53346746863. The reversal of 53346746821 is 12864764335.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31014732100 + 22332014721 = 176110^2 + 149439^2 .

It is a cyclic number.

It is not a de Polignac number, because 53346746821 - 2⁹ = 53346746309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53346746891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26673373410 + 26673373411.

It is an arithmetic number, because the mean of its divisors is an integer number (26673373411).

Almost surely, 2^53346746821 is an apocalyptic number.

It is an amenable number.

53346746821 is a deficient number, since it is larger than the sum of its proper divisors (1).

53346746821 is an equidigital number, since it uses as much as digits as its factorization.

53346746821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 49.

The spelling of 53346746821 in words is "fifty-three billion, three hundred forty-six million, seven hundred forty-six thousand, eight hundred twenty-one".