821364576611 has 2 divisors, whose sum is σ = 821364576612. Its totient is φ = 821364576610.

The previous prime is 821364576577. The next prime is 821364576623. The reversal of 821364576611 is 116675463128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 821364576611 - 2¹⁰ = 821364575587 is a prime.

It is a super-2 number, since 2×821364576611² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 821364576611.

It is not a weakly prime, because it can be changed into another prime (821364576211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410682288305 + 410682288306.

It is an arithmetic number, because the mean of its divisors is an integer number (410682288306).

Almost surely, 2^821364576611 is an apocalyptic number.

821364576611 is a deficient number, since it is larger than the sum of its proper divisors (1).

821364576611 is an equidigital number, since it uses as much as digits as its factorization.

821364576611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 50.

The spelling of 821364576611 in words is "eight hundred twenty-one billion, three hundred sixty-four million, five hundred seventy-six thousand, six hundred eleven".