778563740823 has 16 divisors (see below), whose sum is σ = 1136968140672. Its totient is φ = 469976900000.

The previous prime is 778563740807. The next prime is 778563740837. The reversal of 778563740823 is 328047365877.

It is a cyclic number.

It is not a de Polignac number, because 778563740823 - 2⁴ = 778563740807 is a prime.

It is a super-2 number, since 2×778563740823² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778563740803) 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 15 ways as a sum of consecutive naturals, for example, 46989408 + ... + 47005973.

It is an arithmetic number, because the mean of its divisors is an integer number (71060508792).

Almost surely, 2^778563740823 is an apocalyptic number.

778563740823 is a deficient number, since it is larger than the sum of its proper divisors (358404399849).

778563740823 is a wasteful number, since it uses less digits than its factorization.

778563740823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93995646.

The product of its (nonzero) digits is 47416320, while the sum is 60.

The spelling of 778563740823 in words is "seven hundred seventy-eight billion, five hundred sixty-three million, seven hundred forty thousand, eight hundred twenty-three".