821385592046 has 16 divisors (see below), whose sum is σ = 1298308799760. Its totient is φ = 388662131520.

The previous prime is 821385592043. The next prime is 821385592063. The reversal of 821385592046 is 640295583128.

It is a happy number.

It is a super-2 number, since 2×821385592046² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821385592043) 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, 11498765 + ... + 11569976.

It is an arithmetic number, because the mean of its divisors is an integer number (81144299985).

Almost surely, 2^821385592046 is an apocalyptic number.

821385592046 is a deficient number, since it is larger than the sum of its proper divisors (476923207714).

821385592046 is a wasteful number, since it uses less digits than its factorization.

821385592046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23069699.

The product of its (nonzero) digits is 4147200, while the sum is 53.

The spelling of 821385592046 in words is "eight hundred twenty-one billion, three hundred eighty-five million, five hundred ninety-two thousand, forty-six".