51198658193 has 2 divisors, whose sum is σ = 51198658194. Its totient is φ = 51198658192.

The previous prime is 51198658183. The next prime is 51198658211. The reversal of 51198658193 is 39185689115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42149321809 + 9049336384 = 205303^2 + 95128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51198658193 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51198658103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25599329096 + 25599329097.

It is an arithmetic number, because the mean of its divisors is an integer number (25599329097).

Almost surely, 2^51198658193 is an apocalyptic number.

It is an amenable number.

51198658193 is a deficient number, since it is larger than the sum of its proper divisors (1).

51198658193 is an equidigital number, since it uses as much as digits as its factorization.

51198658193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2332800, while the sum is 56.

The spelling of 51198658193 in words is "fifty-one billion, one hundred ninety-eight million, six hundred fifty-eight thousand, one hundred ninety-three".