779746406641 has 4 divisors (see below), whose sum is σ = 789616614400. Its totient is φ = 769876198884.

The previous prime is 779746406591. The next prime is 779746406651. The reversal of 779746406641 is 146604647977.

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.

It is a cyclic number.

It is not a de Polignac number, because 779746406641 - 2²¹ = 779744309489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 779746406641.

It is not an unprimeable number, because it can be changed into a prime (779746406651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4935103761 + ... + 4935103918.

It is an arithmetic number, because the mean of its divisors is an integer number (197404153600).

Almost surely, 2^779746406641 is an apocalyptic number.

It is an amenable number.

779746406641 is a deficient number, since it is larger than the sum of its proper divisors (9870207759).

779746406641 is an equidigital number, since it uses as much as digits as its factorization.

779746406641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9870207758.

The product of its (nonzero) digits is 42674688, while the sum is 61.

The spelling of 779746406641 in words is "seven hundred seventy-nine billion, seven hundred forty-six million, four hundred six thousand, six hundred forty-one".