821347601316 has 24 divisors (see below), whose sum is σ = 2090702985504. Its totient is φ = 248893212480.

The previous prime is 821347601293. The next prime is 821347601351. The reversal of 821347601316 is 613106743128.

It is a happy number.

It is a super-2 number, since 2×821347601316² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3111165025 + ... + 3111165288.

It is an arithmetic number, because the mean of its divisors is an integer number (87112624396).

Almost surely, 2^821347601316 is an apocalyptic number.

It is an amenable number.

821347601316 is an abundant number, since it is smaller than the sum of its proper divisors (1269355384188).

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

821347601316 is a wasteful number, since it uses less digits than its factorization.

821347601316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6222330331 (or 6222330329 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 821347601316 in words is "eight hundred twenty-one billion, three hundred forty-seven million, six hundred one thousand, three hundred sixteen".