1100115001605 has 16 divisors (see below), whose sum is σ = 1760202622080. Its totient is φ = 586721794368.

The previous prime is 1100115001603. The next prime is 1100115001627. The reversal of 1100115001605 is 5061005110011.

It is a happy number.

It is not a de Polignac number, because 1100115001605 - 2¹ = 1100115001603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100115001603) 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, 1319931 + ... + 1985559.

It is an arithmetic number, because the mean of its divisors is an integer number (110012663880).

Almost surely, 2^{1100115001605} is an apocalyptic number.

1100115001605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1100115001605 is a deficient number, since it is larger than the sum of its proper divisors (660087620475).

1100115001605 is a wasteful number, since it uses less digits than its factorization.

1100115001605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775820.

The product of its (nonzero) digits is 150, while the sum is 21.

The spelling of 1100115001605 in words is "one trillion, one hundred billion, one hundred fifteen million, one thousand, six hundred five".