198057032779 has 2 divisors, whose sum is σ = 198057032780. Its totient is φ = 198057032778.

The previous prime is 198057032759. The next prime is 198057032837. The reversal of 198057032779 is 977230750891.

It is an a-pointer prime, because the next prime (198057032837) can be obtained adding 198057032779 to its sum of digits (58).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198057032779 - 2³¹ = 195909549131 is a prime.

It is not a weakly prime, because it can be changed into another prime (198057032759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99028516389 + 99028516390.

It is an arithmetic number, because the mean of its divisors is an integer number (99028516390).

Almost surely, 2^198057032779 is an apocalyptic number.

198057032779 is a deficient number, since it is larger than the sum of its proper divisors (1).

198057032779 is an equidigital number, since it uses as much as digits as its factorization.

198057032779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6667920, while the sum is 58.

The spelling of 198057032779 in words is "one hundred ninety-eight billion, fifty-seven million, thirty-two thousand, seven hundred seventy-nine".