105551365623 has 32 divisors (see below), whose sum is σ = 157179744000. Its totient is φ = 62464051200.

The previous prime is 105551365567. The next prime is 105551365657. The reversal of 105551365623 is 326563155501.

It is not a de Polignac number, because 105551365623 - 2⁶ = 105551365559 is a prime.

It is a super-2 number, since 2×105551365623² (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 (105551365823) 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 31 ways as a sum of consecutive naturals, for example, 108183 + ... + 472023.

It is an arithmetic number, because the mean of its divisors is an integer number (4911867000).

Almost surely, 2^105551365623 is an apocalyptic number.

105551365623 is a deficient number, since it is larger than the sum of its proper divisors (51628378377).

105551365623 is a wasteful number, since it uses less digits than its factorization.

105551365623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364063.

The product of its (nonzero) digits is 405000, while the sum is 42.

It can be divided in two parts, 105551 and 365623, that added together give a palindrome (471174).

The spelling of 105551365623 in words is "one hundred five billion, five hundred fifty-one million, three hundred sixty-five thousand, six hundred twenty-three".