53566531409 has 2 divisors, whose sum is σ = 53566531410. Its totient is φ = 53566531408.

The previous prime is 53566531379. The next prime is 53566531433. The reversal of 53566531409 is 90413566535.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39153328384 + 14413203025 = 197872^2 + 120055^2 .

It is a cyclic number.

It is not a de Polignac number, because 53566531409 - 2⁸ = 53566531153 is a prime.

It is not a weakly prime, because it can be changed into another prime (53566539409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26783265704 + 26783265705.

It is an arithmetic number, because the mean of its divisors is an integer number (26783265705).

Almost surely, 2^53566531409 is an apocalyptic number.

It is an amenable number.

53566531409 is a deficient number, since it is larger than the sum of its proper divisors (1).

53566531409 is an equidigital number, since it uses as much as digits as its factorization.

53566531409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458000, while the sum is 47.

The spelling of 53566531409 in words is "fifty-three billion, five hundred sixty-six million, five hundred thirty-one thousand, four hundred nine".