778375453613 has 16 divisors (see below), whose sum is σ = 826262830080. Its totient is φ = 730722898176.

The previous prime is 778375453571. The next prime is 778375453633. The reversal of 778375453613 is 316354573877.

It is a cyclic number.

It is not a de Polignac number, because 778375453613 - 2¹² = 778375449517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778375453633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18651056 + ... + 18692742.

It is an arithmetic number, because the mean of its divisors is an integer number (51641426880).

Almost surely, 2^778375453613 is an apocalyptic number.

It is an amenable number.

778375453613 is a deficient number, since it is larger than the sum of its proper divisors (47887376467).

778375453613 is a wasteful number, since it uses less digits than its factorization.

778375453613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44476.

The product of its digits is 44452800, while the sum is 59.

The spelling of 778375453613 in words is "seven hundred seventy-eight billion, three hundred seventy-five million, four hundred fifty-three thousand, six hundred thirteen".