822697321920 has 112 divisors (see below), whose sum is σ = 2637424158720. Its totient is φ = 217255965696.

The previous prime is 822697321903. The next prime is 822697321949. The reversal of 822697321920 is 29123796228.

822697321920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×822697321920² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4061200 + ... + 4258959.

Almost surely, 2^822697321920 is an apocalyptic number.

822697321920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

822697321920 is an abundant number, since it is smaller than the sum of its proper divisors (1814726836800).

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

822697321920 is a wasteful number, since it uses less digits than its factorization.

822697321920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8320282 (or 8320272 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 822697321920 in words is "eight hundred twenty-two billion, six hundred ninety-seven million, three hundred twenty-one thousand, nine hundred twenty".