780553056 has 24 divisors (see below), whose sum is σ = 2048952024. Its totient is φ = 260184320.

The previous prime is 780553019. The next prime is 780553057. The reversal of 780553056 is 650355087.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780553057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4065285 + ... + 4065476.

It is an arithmetic number, because the mean of its divisors is an integer number (85373001).

Almost surely, 2^780553056 is an apocalyptic number.

It is an amenable number.

780553056 is an abundant number, since it is smaller than the sum of its proper divisors (1268398968).

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

780553056 is a wasteful number, since it uses less digits than its factorization.

780553056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8130774 (or 8130766 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 780553056 is about 27938.3796237362. The cubic root of 780553056 is about 920.7339197241.

The spelling of 780553056 in words is "seven hundred eighty million, five hundred fifty-three thousand, fifty-six".