821865761082 has 48 divisors (see below), whose sum is σ = 1849452302880. Its totient is φ = 263454660000.

The previous prime is 821865761071. The next prime is 821865761099. The reversal of 821865761082 is 280167568128.

821865761082 is a `hidden beast` number, since 8 + 2 + 18 + 6 + 5 + 7 + 610 + 8 + 2 = 666.

821865761082 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3005344 + ... + 3267387.

It is an arithmetic number, because the mean of its divisors is an integer number (38530256310).

Almost surely, 2^821865761082 is an apocalyptic number.

821865761082 is an abundant number, since it is smaller than the sum of its proper divisors (1027586541798).

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

821865761082 is a wasteful number, since it uses less digits than its factorization.

821865761082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6273019 (or 6273016 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 821865761082 in words is "eight hundred twenty-one billion, eight hundred sixty-five million, seven hundred sixty-one thousand, eighty-two".