105550661511 has 12 divisors (see below), whose sum is σ = 154298960088. Its totient is φ = 69519310704.

The previous prime is 105550661479. The next prime is 105550661533. The reversal of 105550661511 is 115166055501.

It is a happy number.

It is not a de Polignac number, because 105550661511 - 2⁵ = 105550661479 is a prime.

It is a super-2 number, since 2×105550661511² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105550661551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70648960 + ... + 70650453.

It is an arithmetic number, because the mean of its divisors is an integer number (12858246674).

Almost surely, 2^105550661511 is an apocalyptic number.

105550661511 is a deficient number, since it is larger than the sum of its proper divisors (48748298577).

105550661511 is a wasteful number, since it uses less digits than its factorization.

105550661511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141299502 (or 141299499 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 105550661511 in words is "one hundred five billion, five hundred fifty million, six hundred sixty-one thousand, five hundred eleven".