821622808676 has 24 divisors (see below), whose sum is σ = 1500524337984. Its totient is φ = 392905608480.

The previous prime is 821622808673. The next prime is 821622808679. The reversal of 821622808676 is 676808226128.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (821622808673) and next prime (821622808679).

It is not an unprimeable number, because it can be changed into a prime (821622808673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320486 + ... + 1321346.

It is an arithmetic number, because the mean of its divisors is an integer number (62521847416).

Almost surely, 2^821622808676 is an apocalyptic number.

It is an amenable number.

821622808676 is a deficient number, since it is larger than the sum of its proper divisors (678901529308).

821622808676 is a wasteful number, since it uses less digits than its factorization.

821622808676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009811 (or 1009809 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 56.

The spelling of 821622808676 in words is "eight hundred twenty-one billion, six hundred twenty-two million, eight hundred eight thousand, six hundred seventy-six".