111356951989 has 16 divisors (see below), whose sum is σ = 112899136000. Its totient is φ = 109827814464.

The previous prime is 111356951969. The next prime is 111356952041. The reversal of 111356951989 is 989159653111.

It is a cyclic number.

It is not a de Polignac number, because 111356951989 - 2⁵ = 111356951957 is a prime.

It is a super-2 number, since 2×111356951989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111356951969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13433404 + ... + 13441690.

It is an arithmetic number, because the mean of its divisors is an integer number (7056196000).

Almost surely, 2^111356951989 is an apocalyptic number.

It is an amenable number.

111356951989 is a deficient number, since it is larger than the sum of its proper divisors (1542184011).

111356951989 is a wasteful number, since it uses less digits than its factorization.

111356951989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9052.

The product of its digits is 2624400, while the sum is 58.

The spelling of 111356951989 in words is "one hundred eleven billion, three hundred fifty-six million, nine hundred fifty-one thousand, nine hundred eighty-nine".