51232794409 has 2 divisors, whose sum is σ = 51232794410. Its totient is φ = 51232794408.

The previous prime is 51232794269. The next prime is 51232794421. The reversal of 51232794409 is 90449723215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29938688784 + 21294105625 = 173028^2 + 145925^2 .

It is a cyclic number.

It is not a de Polignac number, because 51232794409 - 2¹⁷ = 51232663337 is a prime.

It is not a weakly prime, because it can be changed into another prime (51232794439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25616397204 + 25616397205.

It is an arithmetic number, because the mean of its divisors is an integer number (25616397205).

Almost surely, 2^51232794409 is an apocalyptic number.

It is an amenable number.

51232794409 is a deficient number, since it is larger than the sum of its proper divisors (1).

51232794409 is an equidigital number, since it uses as much as digits as its factorization.

51232794409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 51232794409 in words is "fifty-one billion, two hundred thirty-two million, seven hundred ninety-four thousand, four hundred nine".