821340459960 has 64 divisors (see below), whose sum is σ = 2464138450080. Its totient is φ = 219013716480.

The previous prime is 821340459887. The next prime is 821340459967. The reversal of 821340459960 is 69954043128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821340459967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2563234 + ... + 2865806.

Almost surely, 2^821340459960 is an apocalyptic number.

It is an amenable number.

821340459960 is an abundant number, since it is smaller than the sum of its proper divisors (1642797990120).

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

821340459960 is a wasteful number, since it uses less digits than its factorization.

821340459960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325208 (or 325204 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 821340459960 in words is "eight hundred twenty-one billion, three hundred forty million, four hundred fifty-nine thousand, nine hundred sixty".