111778438849 has 32 divisors (see below), whose sum is σ = 143047296000. Its totient is φ = 84823218240.

The previous prime is 111778438831. The next prime is 111778438853. The reversal of 111778438849 is 948834877111.

It is a cyclic number.

It is not a de Polignac number, because 111778438849 - 2⁷ = 111778438721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111778438859) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 371127 + ... + 601075.

It is an arithmetic number, because the mean of its divisors is an integer number (4470228000).

Almost surely, 2^111778438849 is an apocalyptic number.

It is an amenable number.

111778438849 is a deficient number, since it is larger than the sum of its proper divisors (31268857151).

111778438849 is a wasteful number, since it uses less digits than its factorization.

111778438849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230133.

The product of its digits is 10838016, while the sum is 61.

The spelling of 111778438849 in words is "one hundred eleven billion, seven hundred seventy-eight million, four hundred thirty-eight thousand, eight hundred forty-nine".