105550550551 has 4 divisors (see below), whose sum is σ = 105558460272. Its totient is φ = 105542640832.

The previous prime is 105550550549. The next prime is 105550550557. The reversal of 105550550551 is 155055055501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155055055501 = 373063 ⋅415627.

It is a cyclic number.

It is not a de Polignac number, because 105550550551 - 2¹ = 105550550549 is a prime.

It is a super-2 number, since 2×105550550551² (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 105550550551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105550550557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3934810 + ... + 3961543.

It is an arithmetic number, because the mean of its divisors is an integer number (26389615068).

Almost surely, 2^105550550551 is an apocalyptic number.

105550550551 is a deficient number, since it is larger than the sum of its proper divisors (7909721).

105550550551 is an equidigital number, since it uses as much as digits as its factorization.

105550550551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7909720.

The product of its (nonzero) digits is 78125, while the sum is 37.

The spelling of 105550550551 in words is "one hundred five billion, five hundred fifty million, five hundred fifty thousand, five hundred fifty-one".