821276261622 has 48 divisors (see below), whose sum is σ = 1787154144048. Its totient is φ = 272572445760.

The previous prime is 821276261621. The next prime is 821276261651. The reversal of 821276261622 is 226162672128.

821276261622 is a `hidden beast` number, since 8 + 2 + 1 + 2 + 7 + 6 + 2 + 616 + 22 = 666.

It is a super-4 number, since 4×821276261622⁴ (a number of 49 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821276261621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5682568 + ... + 5825300.

It is an arithmetic number, because the mean of its divisors is an integer number (37232378001).

Almost surely, 2^821276261622 is an apocalyptic number.

821276261622 is an abundant number, since it is smaller than the sum of its proper divisors (965877882426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

821276261622 is a wasteful number, since it uses less digits than its factorization.

821276261622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144125 (or 144122 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The spelling of 821276261622 in words is "eight hundred twenty-one billion, two hundred seventy-six million, two hundred sixty-one thousand, six hundred twenty-two".