779390854971 has 4 divisors (see below), whose sum is σ = 1039187806632. Its totient is φ = 519593903312.

The previous prime is 779390854919. The next prime is 779390854997. The reversal of 779390854971 is 179458093977.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 779390854971 - 2¹³ = 779390846779 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 779390854896 and 779390854905.

It is not an unprimeable number, because it can be changed into a prime (779394854971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129898475826 + ... + 129898475831.

It is an arithmetic number, because the mean of its divisors is an integer number (259796951658).

Almost surely, 2^779390854971 is an apocalyptic number.

779390854971 is a deficient number, since it is larger than the sum of its proper divisors (259796951661).

779390854971 is a wasteful number, since it uses less digits than its factorization.

779390854971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259796951660.

The product of its (nonzero) digits is 120022560, while the sum is 69.

It can be divided in two parts, 779390 and 854971, that added together give a palindrome (1634361).

The spelling of 779390854971 in words is "seven hundred seventy-nine billion, three hundred ninety million, eight hundred fifty-four thousand, nine hundred seventy-one".