111369408138 has 16 divisors (see below), whose sum is σ = 247487573760. Its totient is φ = 37123136028.

The previous prime is 111369408127. The next prime is 111369408149. The reversal of 111369408138 is 831804963111.

111369408138 is a `hidden beast` number, since 111 + 369 + 40 + 8 + 138 = 666.

It is an interprime number because it is at equal distance from previous prime (111369408127) and next prime (111369408149).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111369408093 and 111369408102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1031198170 + ... + 1031198277.

It is an arithmetic number, because the mean of its divisors is an integer number (15467973360).

Almost surely, 2^111369408138 is an apocalyptic number.

111369408138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

111369408138 is an abundant number, since it is smaller than the sum of its proper divisors (136118165622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111369408138 is a wasteful number, since it uses less digits than its factorization.

111369408138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062396458 (or 2062396452 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 111369408138 in words is "one hundred eleven billion, three hundred sixty-nine million, four hundred eight thousand, one hundred thirty-eight".