778798897877 has 64 divisors (see below), whose sum is σ = 1056907353600. Its totient is φ = 554159232000.

The previous prime is 778798897859. The next prime is 778798897913.

778798897877 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 778798897877 - 2¹⁴ = 778798881493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778798857877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 156602963 + ... + 156607935.

It is an arithmetic number, because the mean of its divisors is an integer number (16514177400).

Almost surely, 2^778798897877 is an apocalyptic number.

778798897877 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

778798897877 is a deficient number, since it is larger than the sum of its proper divisors (278108455723).

778798897877 is a wasteful number, since it uses less digits than its factorization.

778798897877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6654.

The product of its digits is 39033114624, while the sum is 92.

The spelling of 778798897877 in words is "seven hundred seventy-eight billion, seven hundred ninety-eight million, eight hundred ninety-seven thousand, eight hundred seventy-seven".