821069857002 has 16 divisors (see below), whose sum is σ = 1644693593760. Its totient is φ = 273264305712.

The previous prime is 821069856983. The next prime is 821069857009. The reversal of 821069857002 is 200758960128.

It is not an unprimeable number, because it can be changed into a prime (821069857009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106407477 + ... + 106415192.

It is an arithmetic number, because the mean of its divisors is an integer number (102793349610).

Almost surely, 2^821069857002 is an apocalyptic number.

821069857002 is an abundant number, since it is smaller than the sum of its proper divisors (823623736758).

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

821069857002 is a wasteful number, since it uses less digits than its factorization.

821069857002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212823317.

The product of its (nonzero) digits is 483840, while the sum is 48.

The spelling of 821069857002 in words is "eight hundred twenty-one billion, sixty-nine million, eight hundred fifty-seven thousand, two".