105056100005561 has 4 divisors (see below), whose sum is σ = 105056285632500. Its totient is φ = 105055914378624.

The previous prime is 105056100005497. The next prime is 105056100005573. The reversal of 105056100005561 is 165500001650501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47639412341161 + 57416687664400 = 6902131^2 + 7577380^2 .

It is a cyclic number.

It is not a de Polignac number, because 105056100005561 - 2⁶ = 105056100005497 is a prime.

It is a super-2 number, since 2×105056100005561² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105056100005581) 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, 91961936 + ... + 93097313.

It is an arithmetic number, because the mean of its divisors is an integer number (26264071408125).

Almost surely, 2^{105056100005561} is an apocalyptic number.

It is an amenable number.

105056100005561 is a deficient number, since it is larger than the sum of its proper divisors (185626939).

105056100005561 is an equidigital number, since it uses as much as digits as its factorization.

105056100005561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185626938.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 105056100005561 in words is "one hundred five trillion, fifty-six billion, one hundred million, five thousand, five hundred sixty-one".