198795777 has 16 divisors (see below), whose sum is σ = 276444672. Its totient is φ = 126927360.

The previous prime is 198795763. The next prime is 198795797. The reversal of 198795777 is 777597891.

It is not a de Polignac number, because 198795777 - 2⁴ = 198795761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198795777.

It is not an unprimeable number, because it can be changed into a prime (198795797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1998 + ... + 20039.

It is an arithmetic number, because the mean of its divisors is an integer number (17277792).

Almost surely, 2^198795777 is an apocalyptic number.

It is an amenable number.

198795777 is a deficient number, since it is larger than the sum of its proper divisors (77648895).

198795777 is a wasteful number, since it uses less digits than its factorization.

198795777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22168.

The product of its digits is 7779240, while the sum is 60.

The square root of 198795777 is about 14099.4956292770. The cubic root of 198795777 is about 583.6274608859.

The spelling of 198795777 in words is "one hundred ninety-eight million, seven hundred ninety-five thousand, seven hundred seventy-seven".