53864375561 has 2 divisors, whose sum is σ = 53864375562. Its totient is φ = 53864375560.

The previous prime is 53864375497. The next prime is 53864375563. The reversal of 53864375561 is 16557346835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35849635600 + 18014739961 = 189340^2 + 134219^2 .

It is a cyclic number.

It is not a de Polignac number, because 53864375561 - 2⁶ = 53864375497 is a prime.

Together with 53864375563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53864375563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26932187780 + 26932187781.

It is an arithmetic number, because the mean of its divisors is an integer number (26932187781).

Almost surely, 2^53864375561 is an apocalyptic number.

It is an amenable number.

53864375561 is a deficient number, since it is larger than the sum of its proper divisors (1).

53864375561 is an equidigital number, since it uses as much as digits as its factorization.

53864375561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072000, while the sum is 53.

The spelling of 53864375561 in words is "fifty-three billion, eight hundred sixty-four million, three hundred seventy-five thousand, five hundred sixty-one".