820271490911 has 8 divisors (see below), whose sum is σ = 837821594880. Its totient is φ = 802725450328.

The previous prime is 820271490847. The next prime is 820271490967. The reversal of 820271490911 is 119094172028.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 820271490911 - 2⁶ = 820271490847 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 (820271490811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 606041 + ... + 1416978.

It is an arithmetic number, because the mean of its divisors is an integer number (104727699360).

Almost surely, 2^820271490911 is an apocalyptic number.

820271490911 is a deficient number, since it is larger than the sum of its proper divisors (17550103969).

820271490911 is a wasteful number, since it uses less digits than its factorization.

820271490911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031693.

The product of its (nonzero) digits is 72576, while the sum is 44.

The spelling of 820271490911 in words is "eight hundred twenty billion, two hundred seventy-one million, four hundred ninety thousand, nine hundred eleven".