53453352155561 has 2 divisors, whose sum is σ = 53453352155562. Its totient is φ = 53453352155560.

The previous prime is 53453352155527. The next prime is 53453352155597. The reversal of 53453352155561 is 16555125335435.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33321583075225 + 20131769080336 = 5772485^2 + 4486844^2 .

It is a cyclic number.

It is not a de Polignac number, because 53453352155561 - 2³⁸ = 53178474248617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (53453352155501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26726676077780 + 26726676077781.

It is an arithmetic number, because the mean of its divisors is an integer number (26726676077781).

Almost surely, 2^{53453352155561} is an apocalyptic number.

It is an amenable number.

53453352155561 is a deficient number, since it is larger than the sum of its proper divisors (1).

53453352155561 is an equidigital number, since it uses as much as digits as its factorization.

53453352155561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20250000, while the sum is 53.

The spelling of 53453352155561 in words is "fifty-three trillion, four hundred fifty-three billion, three hundred fifty-two million, one hundred fifty-five thousand, five hundred sixty-one".