105561511055 has 64 divisors (see below), whose sum is σ = 170452187136. Its totient is φ = 60609600000.

The previous prime is 105561511049. The next prime is 105561511079. The reversal of 105561511055 is 550115165501.

It is not a de Polignac number, because 105561511055 - 2¹² = 105561506959 is a prime.

It is a super-2 number, since 2×105561511055² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2284430 + ... + 2330180.

It is an arithmetic number, because the mean of its divisors is an integer number (2663315424).

Almost surely, 2^105561511055 is an apocalyptic number.

105561511055 is a deficient number, since it is larger than the sum of its proper divisors (64890676081).

105561511055 is a wasteful number, since it uses less digits than its factorization.

105561511055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46248.

The product of its (nonzero) digits is 18750, while the sum is 35.

Adding to 105561511055 its reverse (550115165501), we get a palindrome (655676676556).

It can be divided in two parts, 105561 and 511055, that added together give a palindrome (616616).

The spelling of 105561511055 in words is "one hundred five billion, five hundred sixty-one million, five hundred eleven thousand, fifty-five".