821345703936 has 48 divisors (see below), whose sum is σ = 2189720496600. Its totient is φ = 273781899264.

The previous prime is 821345703929. The next prime is 821345704007. The reversal of 821345703936 is 639307543128.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66835141 + ... + 66847428.

It is a 1-persistent number, because it is pandigital, but 2⋅821345703936 = 1642691407872 is not.

Almost surely, 2^821345703936 is an apocalyptic number.

It is an amenable number.

821345703936 is an abundant number, since it is smaller than the sum of its proper divisors (1368374792664).

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

821345703936 is a wasteful number, since it uses less digits than its factorization.

821345703936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133682594 (or 133682574 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 51.

The spelling of 821345703936 in words is "eight hundred twenty-one billion, three hundred forty-five million, seven hundred three thousand, nine hundred thirty-six".