805161778848 has 192 divisors, whose sum is σ = 2770449776640. Its totient is φ = 222625324800.

The previous prime is 805161778823. The next prime is 805161778853. The reversal of 805161778848 is 848877161508.

805161778848 is a `hidden beast` number, since 8 + 0 + 5 + 1 + 617 + 7 + 8 + 8 + 4 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1959748 + ... + 2334723.

It is an arithmetic number, because the mean of its divisors is an integer number (14429425920).

Almost surely, 2^805161778848 is an apocalyptic number.

It is an amenable number.

805161778848 is an abundant number, since it is smaller than the sum of its proper divisors (1965287997792).

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

805161778848 is a wasteful number, since it uses less digits than its factorization.

805161778848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4294528 (or 4294514 counting only the distinct ones).

The product of its (nonzero) digits is 24084480, while the sum is 63.

The spelling of 805161778848 in words is "eight hundred five billion, one hundred sixty-one million, seven hundred seventy-eight thousand, eight hundred forty-eight".