819315720011 has 4 divisors (see below), whose sum is σ = 819321196224. Its totient is φ = 819310243800.

The previous prime is 819315719993. The next prime is 819315720017. The reversal of 819315720011 is 110027513918.

It is a happy number.

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 819315720011 - 2¹⁰ = 819315718987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (819315720017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2507195 + ... + 2815076.

It is an arithmetic number, because the mean of its divisors is an integer number (204830299056).

Almost surely, 2^819315720011 is an apocalyptic number.

819315720011 is a deficient number, since it is larger than the sum of its proper divisors (5476213).

819315720011 is a wasteful number, since it uses less digits than its factorization.

819315720011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5476212.

The product of its (nonzero) digits is 15120, while the sum is 38.

The spelling of 819315720011 in words is "eight hundred nineteen billion, three hundred fifteen million, seven hundred twenty thousand, eleven".