823157863760 has 80 divisors (see below), whose sum is σ = 1958896003584. Its totient is φ = 321599517696.

The previous prime is 823157863727. The next prime is 823157863771. The reversal of 823157863760 is 67368751328.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 823157863696 and 823157863705.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82712 + ... + 1285751.

Almost surely, 2^823157863760 is an apocalyptic number.

823157863760 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 823157863760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (979448001792).

823157863760 is an abundant number, since it is smaller than the sum of its proper divisors (1135738139824).

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

823157863760 is a wasteful number, since it uses less digits than its factorization.

823157863760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368652 (or 1368646 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 56.

The spelling of 823157863760 in words is "eight hundred twenty-three billion, one hundred fifty-seven million, eight hundred sixty-three thousand, seven hundred sixty".