10111216778 has 8 divisors (see below), whose sum is σ = 16333504068. Its totient is φ = 4666715424.

The previous prime is 10111216777. The next prime is 10111216781. The reversal of 10111216778 is 87761211101.

10111216778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9695750089 + 415466689 = 98467^2 + 20383^2 .

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

It is not an unprimeable number, because it can be changed into a prime (10111216777) 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 3 ways as a sum of consecutive naturals, for example, 194446451 + ... + 194446502.

Almost surely, 2^10111216778 is an apocalyptic number.

10111216778 is a deficient number, since it is larger than the sum of its proper divisors (6222287290).

10111216778 is a wasteful number, since it uses less digits than its factorization.

10111216778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388892968.

The product of its (nonzero) digits is 4704, while the sum is 35.

Adding to 10111216778 its reverse (87761211101), we get a palindrome (97872427879).

The spelling of 10111216778 in words is "ten billion, one hundred eleven million, two hundred sixteen thousand, seven hundred seventy-eight".