805780405445 has 16 divisors (see below), whose sum is σ = 983000759040. Its totient is φ = 633960096000.

The previous prime is 805780405429. The next prime is 805780405453. The reversal of 805780405445 is 544504087508.

805780405445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 805780405445 - 2⁴ = 805780405429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 805780405393 and 805780405402.

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, 2687825 + ... + 2972534.

It is an arithmetic number, because the mean of its divisors is an integer number (61437547440).

Almost surely, 2^805780405445 is an apocalyptic number.

It is an amenable number.

805780405445 is a deficient number, since it is larger than the sum of its proper divisors (177220353595).

805780405445 is a wasteful number, since it uses less digits than its factorization.

805780405445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5660836.

The product of its (nonzero) digits is 3584000, while the sum is 50.

The spelling of 805780405445 in words is "eight hundred five billion, seven hundred eighty million, four hundred five thousand, four hundred forty-five".