1194231510509 has 2 divisors, whose sum is σ = 1194231510510. Its totient is φ = 1194231510508.

The previous prime is 1194231510421. The next prime is 1194231510517. The reversal of 1194231510509 is 9050151324911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 754775213284 + 439456297225 = 868778^2 + 662915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1194231510509 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1194231590509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 597115755254 + 597115755255.

It is an arithmetic number, because the mean of its divisors is an integer number (597115755255).

Almost surely, 2^{1194231510509} is an apocalyptic number.

It is an amenable number.

1194231510509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1194231510509 is an equidigital number, since it uses as much as digits as its factorization.

1194231510509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 41.

The spelling of 1194231510509 in words is "one trillion, one hundred ninety-four billion, two hundred thirty-one million, five hundred ten thousand, five hundred nine".