105551555511 has 8 divisors (see below), whose sum is σ = 140876570224. Its totient is φ = 70297122240.

The previous prime is 105551555507. The next prime is 105551555531. The reversal of 105551555511 is 115555155501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 105551555511 - 2² = 105551555507 is a prime.

It is a super-2 number, since 2×105551555511² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 105551555511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105551555531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17641870 + ... + 17647851.

It is an arithmetic number, because the mean of its divisors is an integer number (17609571278).

Almost surely, 2^105551555511 is an apocalyptic number.

105551555511 is a deficient number, since it is larger than the sum of its proper divisors (35325014713).

105551555511 is an equidigital number, since it uses as much as digits as its factorization.

105551555511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35290721.

The product of its (nonzero) digits is 78125, while the sum is 39.

The spelling of 105551555511 in words is "one hundred five billion, five hundred fifty-one million, five hundred fifty-five thousand, five hundred eleven".