778440114221 has 16 divisors (see below), whose sum is σ = 972646465920. Its totient is φ = 605249383680.

The previous prime is 778440114203. The next prime is 778440114223. The reversal of 778440114221 is 122411044877.

It is a cyclic number.

It is not a de Polignac number, because 778440114221 - 2¹⁴ = 778440097837 is a prime.

It is a super-2 number, since 2×778440114221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778440114223) 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, 11025656 + ... + 11096033.

It is an arithmetic number, because the mean of its divisors is an integer number (60790404120).

Almost surely, 2^778440114221 is an apocalyptic number.

It is an amenable number.

778440114221 is a deficient number, since it is larger than the sum of its proper divisors (194206351699).

778440114221 is a wasteful number, since it uses less digits than its factorization.

778440114221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22122164.

The product of its (nonzero) digits is 100352, while the sum is 41.

The spelling of 778440114221 in words is "seven hundred seventy-eight billion, four hundred forty million, one hundred fourteen thousand, two hundred twenty-one".