780328025305 has 4 divisors (see below), whose sum is σ = 936393630372. Its totient is φ = 624262420240.

The previous prime is 780328025303. The next prime is 780328025369. The reversal of 780328025305 is 503520823087.

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 568202379264 + 212125646041 = 753792^2 + 460571^2 .

It is not a de Polignac number, because 780328025305 - 2¹ = 780328025303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (780328025303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78032802526 + ... + 78032802535.

It is an arithmetic number, because the mean of its divisors is an integer number (234098407593).

Almost surely, 2^780328025305 is an apocalyptic number.

It is an amenable number.

780328025305 is a deficient number, since it is larger than the sum of its proper divisors (156065605067).

780328025305 is a wasteful number, since it uses less digits than its factorization.

780328025305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156065605066.

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 780328025305 in words is "seven hundred eighty billion, three hundred twenty-eight million, twenty-five thousand, three hundred five".