806090321280 has 128 divisors (see below), whose sum is σ = 2569885797600. Its totient is φ = 214917857280.

The previous prime is 806090321251. The next prime is 806090321293. The reversal of 806090321280 is 82123090608.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×806090321280² (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, 11255826 + ... + 11327214.

Almost surely, 2^806090321280 is an apocalyptic number.

806090321280 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 806090321280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1284942898800).

806090321280 is an abundant number, since it is smaller than the sum of its proper divisors (1763795476320).

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

806090321280 is a wasteful number, since it uses less digits than its factorization.

806090321280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77292 (or 77280 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 806090321280 in words is "eight hundred six billion, ninety million, three hundred twenty-one thousand, two hundred eighty".