111671545455 has 192 divisors, whose sum is σ = 215870054400. Its totient is φ = 55245649536.

The previous prime is 111671545451. The next prime is 111671545543. The reversal of 111671545455 is 554545176111.

111671545455 is a `hidden beast` number, since 1 + 1 + 1 + 67 + 1 + 545 + 45 + 5 = 666.

It is not a de Polignac number, because 111671545455 - 2² = 111671545451 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 111671545455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111671545451) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 239125132 + ... + 239125598.

It is an arithmetic number, because the mean of its divisors is an integer number (1124323200).

Almost surely, 2^111671545455 is an apocalyptic number.

111671545455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

111671545455 is a deficient number, since it is larger than the sum of its proper divisors (104198508945).

111671545455 is a wasteful number, since it uses less digits than its factorization.

111671545455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752 (or 740 counting only the distinct ones).

The product of its digits is 420000, while the sum is 45.

The spelling of 111671545455 in words is "one hundred eleven billion, six hundred seventy-one million, five hundred forty-five thousand, four hundred fifty-five".