780086045 has 4 divisors (see below), whose sum is σ = 936103260. Its totient is φ = 624068832.

The previous prime is 780086039. The next prime is 780086081. The reversal of 780086045 is 540680087.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 390694756 + 389391289 = 19766^2 + 19733^2 .

It is a cyclic number.

It is not a de Polignac number, because 780086045 - 2⁴ = 780086029 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 78008600 + ... + 78008609.

It is an arithmetic number, because the mean of its divisors is an integer number (234025815).

Almost surely, 2^780086045 is an apocalyptic number.

It is an amenable number.

780086045 is a deficient number, since it is larger than the sum of its proper divisors (156017215).

780086045 is a wasteful number, since it uses less digits than its factorization.

780086045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156017214.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 780086045 is about 27930.0204976652. The cubic root of 780086045 is about 920.5502556542.

The spelling of 780086045 in words is "seven hundred eighty million, eighty-six thousand, forty-five".