49831196688509 has 2 divisors, whose sum is σ = 49831196688510. Its totient is φ = 49831196688508.

The previous prime is 49831196688389. The next prime is 49831196688547. The reversal of 49831196688509 is 90588669113894.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42865133839609 + 6966062848900 = 6547147^2 + 2639330^2 .

It is a cyclic number.

It is not a de Polignac number, because 49831196688509 - 2⁸ = 49831196688253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49831196688509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49831196687509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24915598344254 + 24915598344255.

It is an arithmetic number, because the mean of its divisors is an integer number (24915598344255).

Almost surely, 2^{49831196688509} is an apocalyptic number.

It is an amenable number.

49831196688509 is a deficient number, since it is larger than the sum of its proper divisors (1).

49831196688509 is an equidigital number, since it uses as much as digits as its factorization.

49831196688509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 806215680, while the sum is 77.

The spelling of 49831196688509 in words is "forty-nine trillion, eight hundred thirty-one billion, one hundred ninety-six million, six hundred eighty-eight thousand, five hundred nine".