105561066356 has 6 divisors (see below), whose sum is σ = 184731866130. Its totient is φ = 52780533176.

The previous prime is 105561066353. The next prime is 105561066367. The reversal of 105561066356 is 653660165501.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 105488544100 + 72522256 = 324790^2 + 8516^2 .

It is a super-2 number, since 2×105561066356² (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 (105561066353) 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 as a sum of consecutive naturals, namely, 13195133291 + ... + 13195133298.

It is an arithmetic number, because the mean of its divisors is an integer number (30788644355).

Almost surely, 2^105561066356 is an apocalyptic number.

It is an amenable number.

105561066356 is a deficient number, since it is larger than the sum of its proper divisors (79170799774).

105561066356 is a wasteful number, since it uses less digits than its factorization.

105561066356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26390266593 (or 26390266591 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 44.

The spelling of 105561066356 in words is "one hundred five billion, five hundred sixty-one million, sixty-six thousand, three hundred fifty-six".