199263264385 has 4 divisors (see below), whose sum is σ = 239115917268. Its totient is φ = 159410611504.

The previous prime is 199263264377. The next prime is 199263264401. The reversal of 199263264385 is 583462362991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 583462362991 = 1201 ⋅485813791.

It can be written as a sum of positive squares in 2 ways, for example, as 155422023696 + 43841240689 = 394236^2 + 209383^2 .

It is a cyclic number.

It is not a de Polignac number, because 199263264385 - 2³ = 199263264377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19926326434 + ... + 19926326443.

It is an arithmetic number, because the mean of its divisors is an integer number (59778979317).

Almost surely, 2^199263264385 is an apocalyptic number.

It is an amenable number.

199263264385 is a deficient number, since it is larger than the sum of its proper divisors (39852652883).

199263264385 is an equidigital number, since it uses as much as digits as its factorization.

199263264385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39852652882.

The product of its digits is 16796160, while the sum is 58.

The spelling of 199263264385 in words is "one hundred ninety-nine billion, two hundred sixty-three million, two hundred sixty-four thousand, three hundred eighty-five".