778810341551 has 8 divisors (see below), whose sum is σ = 878908222800. Its totient is φ = 683595283840.

The previous prime is 778810341539. The next prime is 778810341557. The reversal of 778810341551 is 155143018877.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 778810341551 - 2¹⁰ = 778810340527 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 778810341551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778810341557) 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 7 ways as a sum of consecutive naturals, for example, 1220705546 + ... + 1220706183.

It is an arithmetic number, because the mean of its divisors is an integer number (109863527850).

Almost surely, 2^778810341551 is an apocalyptic number.

778810341551 is a deficient number, since it is larger than the sum of its proper divisors (100097881249).

778810341551 is a wasteful number, since it uses less digits than its factorization.

778810341551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2441411769.

The product of its (nonzero) digits is 940800, while the sum is 50.

The spelling of 778810341551 in words is "seven hundred seventy-eight billion, eight hundred ten million, three hundred forty-one thousand, five hundred fifty-one".