778472741 has 4 divisors (see below), whose sum is σ = 778536684. Its totient is φ = 778408800.

The previous prime is 778472689. The next prime is 778472759. The reversal of 778472741 is 147274877.

778472741 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 brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 434555716 + 343917025 = 20846^2 + 18545^2 .

It is a cyclic number.

It is not a de Polignac number, because 778472741 - 2¹⁸ = 778210597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778478741) 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, 7430 + ... + 40151.

It is an arithmetic number, because the mean of its divisors is an integer number (194634171).

Almost surely, 2^778472741 is an apocalyptic number.

It is an amenable number.

778472741 is a deficient number, since it is larger than the sum of its proper divisors (63943).

778472741 is a wasteful number, since it uses less digits than its factorization.

778472741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63942.

The product of its digits is 614656, while the sum is 47.

The square root of 778472741 is about 27901.1243680250. The cubic root of 778472741 is about 919.9152178488.

The spelling of 778472741 in words is "seven hundred seventy-eight million, four hundred seventy-two thousand, seven hundred forty-one".