51173594173409 has 2 divisors, whose sum is σ = 51173594173410. Its totient is φ = 51173594173408.

The previous prime is 51173594173393. The next prime is 51173594173483. The reversal of 51173594173409 is 90437149537115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50912220678400 + 261373495009 = 7135280^2 + 511247^2 .

It is a cyclic number.

It is not a de Polignac number, because 51173594173409 - 2⁴ = 51173594173393 is a prime.

It is not a weakly prime, because it can be changed into another prime (51173594113409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25586797086704 + 25586797086705.

It is an arithmetic number, because the mean of its divisors is an integer number (25586797086705).

Almost surely, 2^{51173594173409} is an apocalyptic number.

It is an amenable number.

51173594173409 is a deficient number, since it is larger than the sum of its proper divisors (1).

51173594173409 is an equidigital number, since it uses as much as digits as its factorization.

51173594173409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14288400, while the sum is 59.

The spelling of 51173594173409 in words is "fifty-one trillion, one hundred seventy-three billion, five hundred ninety-four million, one hundred seventy-three thousand, four hundred nine".