780919195057 has 4 divisors (see below), whose sum is σ = 780974014500. Its totient is φ = 780864375616.

The previous prime is 780919195039. The next prime is 780919195061. The reversal of 780919195057 is 750591919087.

780919195057 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.

It can be written as a sum of positive squares in 2 ways, for example, as 723263501601 + 57655693456 = 850449^2 + 240116^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-780919195057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 780919194986 and 780919195004.

It is not an unprimeable number, because it can be changed into a prime (780919192057) 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, 27388348 + ... + 27416845.

It is an arithmetic number, because the mean of its divisors is an integer number (195243503625).

Almost surely, 2^780919195057 is an apocalyptic number.

It is an amenable number.

780919195057 is a deficient number, since it is larger than the sum of its proper divisors (54819443).

780919195057 is a wasteful number, since it uses less digits than its factorization.

780919195057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54819442.

The product of its (nonzero) digits is 7144200, while the sum is 61.

The spelling of 780919195057 in words is "seven hundred eighty billion, nine hundred nineteen million, one hundred ninety-five thousand, fifty-seven".