198870670783 has 4 divisors (see below), whose sum is σ = 199261379880. Its totient is φ = 198479961688.

The previous prime is 198870670759. The next prime is 198870670787. The reversal of 198870670783 is 387076078891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198870670783 - 2¹⁷ = 198870539711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198870670787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195353785 + ... + 195354802.

It is an arithmetic number, because the mean of its divisors is an integer number (49815344970).

Almost surely, 2^198870670783 is an apocalyptic number.

198870670783 is a deficient number, since it is larger than the sum of its proper divisors (390709097).

198870670783 is an equidigital number, since it uses as much as digits as its factorization.

198870670783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390709096.

The product of its (nonzero) digits is 28449792, while the sum is 64.

The spelling of 198870670783 in words is "one hundred ninety-eight billion, eight hundred seventy million, six hundred seventy thousand, seven hundred eighty-three".