780806461 has 4 divisors (see below), whose sum is σ = 814754592. Its totient is φ = 746858332.

The previous prime is 780806437. The next prime is 780806473. The reversal of 780806461 is 164608087.

780806461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 164608087 = 7 ⋅23515441.

It is a cyclic number.

It is not a de Polignac number, because 780806461 - 2⁷ = 780806333 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780806401) 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, 16974031 + ... + 16974076.

It is an arithmetic number, because the mean of its divisors is an integer number (203688648).

Almost surely, 2^780806461 is an apocalyptic number.

It is an amenable number.

780806461 is a deficient number, since it is larger than the sum of its proper divisors (33948131).

780806461 is a wasteful number, since it uses less digits than its factorization.

780806461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33948130.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 780806461 is about 27942.9143254600. The cubic root of 780806461 is about 920.8335470899.

The spelling of 780806461 in words is "seven hundred eighty million, eight hundred six thousand, four hundred sixty-one".