1105555240665 has 32 divisors (see below), whose sum is σ = 1990310438400. Its totient is φ = 582165792000.

The previous prime is 1105555240661. The next prime is 1105555240681. The reversal of 1105555240665 is 5660425555011.

It is a happy number.

1105555240665 is a `hidden beast` number, since 1 + 1 + 0 + 55 + 552 + 40 + 6 + 6 + 5 = 666.

It is not a de Polignac number, because 1105555240665 - 2² = 1105555240661 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 1105555240665.

It is not an unprimeable number, because it can be changed into a prime (1105555240661) 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, 51820336 + ... + 51841665.

It is an arithmetic number, because the mean of its divisors is an integer number (62197201200).

Almost surely, 2^{1105555240665} is an apocalyptic number.

1105555240665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1105555240665 is a deficient number, since it is larger than the sum of its proper divisors (884755197735).

1105555240665 is a wasteful number, since it uses less digits than its factorization.

1105555240665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103662094 (or 103662088 counting only the distinct ones).

The product of its (nonzero) digits is 900000, while the sum is 45.

The spelling of 1105555240665 in words is "one trillion, one hundred five billion, five hundred fifty-five million, two hundred forty thousand, six hundred sixty-five".