53173074809 has 2 divisors, whose sum is σ = 53173074810. Its totient is φ = 53173074808.

The previous prime is 53173074769. The next prime is 53173074817. The reversal of 53173074809 is 90847037135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32320848400 + 20852226409 = 179780^2 + 144403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53173074809 is a prime.

It is not a weakly prime, because it can be changed into another prime (53173074109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26586537404 + 26586537405.

It is an arithmetic number, because the mean of its divisors is an integer number (26586537405).

Almost surely, 2^53173074809 is an apocalyptic number.

It is an amenable number.

53173074809 is a deficient number, since it is larger than the sum of its proper divisors (1).

53173074809 is an equidigital number, since it uses as much as digits as its factorization.

53173074809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 53173074809 in words is "fifty-three billion, one hundred seventy-three million, seventy-four thousand, eight hundred nine".