821361801960 has 192 divisors, whose sum is σ = 3163764240000. Its totient is φ = 187739824896.

The previous prime is 821361801947. The next prime is 821361801973. The reversal of 821361801960 is 69108163128.

821361801960 is a `hidden beast` number, since 8 + 2 + 13 + 618 + 0 + 19 + 6 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (821361801947) and next prime (821361801973).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5967835 + ... + 6103914.

It is an arithmetic number, because the mean of its divisors is an integer number (16477938750).

Almost surely, 2^821361801960 is an apocalyptic number.

It is an amenable number.

821361801960 is an abundant number, since it is smaller than the sum of its proper divisors (2342402438040).

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

821361801960 is a wasteful number, since it uses less digits than its factorization.

821361801960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12071782 (or 12071766 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 821361801960 in words is "eight hundred twenty-one billion, three hundred sixty-one million, eight hundred one thousand, nine hundred sixty".