805291985376 has 192 divisors, whose sum is σ = 2532691929600. Its totient is φ = 248100019200.

The previous prime is 805291985341. The next prime is 805291985521. The reversal of 805291985376 is 673589192508.

805291985376 is a `hidden beast` number, since 8 + 0 + 5 + 2 + 9 + 1 + 98 + 537 + 6 = 666.

It is a super-2 number, since 2×805291985376² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74821 + ... + 1271291.

It is an arithmetic number, because the mean of its divisors is an integer number (13191103800).

Almost surely, 2^805291985376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 805291985376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1266345964800).

805291985376 is an abundant number, since it is smaller than the sum of its proper divisors (1727399944224).

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

805291985376 is a wasteful number, since it uses less digits than its factorization.

805291985376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196550 (or 1196536 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 63.

The spelling of 805291985376 in words is "eight hundred five billion, two hundred ninety-one million, nine hundred eighty-five thousand, three hundred seventy-six".