821768087350 has 24 divisors (see below), whose sum is σ = 1746844163568. Its totient is φ = 281749058400.

The previous prime is 821768087333. The next prime is 821768087443. The reversal of 821768087350 is 53780867128.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 821768087291 and 821768087300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1173954061 + ... + 1173954760.

It is an arithmetic number, because the mean of its divisors is an integer number (72785173482).

Almost surely, 2^821768087350 is an apocalyptic number.

821768087350 is an abundant number, since it is smaller than the sum of its proper divisors (925076076218).

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

821768087350 is a wasteful number, since it uses less digits than its factorization.

821768087350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347908840 (or 2347908835 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 821768087350 in words is "eight hundred twenty-one billion, seven hundred sixty-eight million, eighty-seven thousand, three hundred fifty".