190778311313 has 4 divisors (see below), whose sum is σ = 191029006308. Its totient is φ = 190527616320.

The previous prime is 190778311291. The next prime is 190778311357. The reversal of 190778311313 is 313113877091.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29862604864 + 160915706449 = 172808^2 + 401143^2 .

It is a cyclic number.

It is not a de Polignac number, because 190778311313 - 2⁶ = 190778311249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190778311363) 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, 125346356 + ... + 125347877.

It is an arithmetic number, because the mean of its divisors is an integer number (47757251577).

Almost surely, 2^190778311313 is an apocalyptic number.

It is an amenable number.

190778311313 is a deficient number, since it is larger than the sum of its proper divisors (250694995).

190778311313 is an equidigital number, since it uses as much as digits as its factorization.

190778311313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250694994.

The product of its (nonzero) digits is 95256, while the sum is 44.

The spelling of 190778311313 in words is "one hundred ninety billion, seven hundred seventy-eight million, three hundred eleven thousand, three hundred thirteen".