780755469 has 16 divisors (see below), whose sum is σ = 1121632512. Its totient is φ = 480230208.

The previous prime is 780755453. The next prime is 780755471. The reversal of 780755469 is 964557087.

It is not a de Polignac number, because 780755469 - 2⁴ = 780755453 is a prime.

It is a super-2 number, since 2×780755469² = 1219158204746819922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780755069) 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 15 ways as a sum of consecutive naturals, for example, 110332 + ... + 117194.

It is an arithmetic number, because the mean of its divisors is an integer number (70102032).

Almost surely, 2^780755469 is an apocalyptic number.

It is an amenable number.

780755469 is a deficient number, since it is larger than the sum of its proper divisors (340877043).

780755469 is a wasteful number, since it uses less digits than its factorization.

780755469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9796.

The product of its (nonzero) digits is 2116800, while the sum is 51.

The square root of 780755469 is about 27942.0018788919. The cubic root of 780755469 is about 920.8135010782.

The spelling of 780755469 in words is "seven hundred eighty million, seven hundred fifty-five thousand, four hundred sixty-nine".