100011161505 has 32 divisors (see below), whose sum is σ = 164373692544. Its totient is φ = 51887886336.

The previous prime is 100011161473. The next prime is 100011161507. The reversal of 100011161505 is 505161110001.

It is a happy number.

It is not a de Polignac number, because 100011161505 - 2⁵ = 100011161473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100011161507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3628737 + ... + 3656193.

It is an arithmetic number, because the mean of its divisors is an integer number (5136677892).

Almost surely, 2^100011161505 is an apocalyptic number.

100011161505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100011161505 is a deficient number, since it is larger than the sum of its proper divisors (64362531039).

100011161505 is a wasteful number, since it uses less digits than its factorization.

100011161505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34065.

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

Adding to 100011161505 its reverse (505161110001), we get a palindrome (605172271506).

The spelling of 100011161505 in words is "one hundred billion, eleven million, one hundred sixty-one thousand, five hundred five".