805311051078 has 32 divisors (see below), whose sum is σ = 1695439497600. Its totient is φ = 254301581376.

The previous prime is 805311051053. The next prime is 805311051157. The reversal of 805311051078 is 870150113508.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5184913 + ... + 5337971.

It is an arithmetic number, because the mean of its divisors is an integer number (52982484300).

Almost surely, 2^805311051078 is an apocalyptic number.

805311051078 is an abundant number, since it is smaller than the sum of its proper divisors (890128446522).

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

805311051078 is a wasteful number, since it uses less digits than its factorization.

805311051078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199236.

The product of its (nonzero) digits is 33600, while the sum is 39.

The spelling of 805311051078 in words is "eight hundred five billion, three hundred eleven million, fifty-one thousand, seventy-eight".