105555520572261 has 16 divisors (see below), whose sum is σ = 142216607891904. Its totient is φ = 69632645036544.

The previous prime is 105555520572233. The next prime is 105555520572317. The reversal of 105555520572261 is 162275025555501.

It is not a de Polignac number, because 105555520572261 - 2⁹ = 105555520571749 is a prime.

It is a super-2 number, since 2×105555520572261² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105555520572211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30201211 + ... + 33514536.

It is an arithmetic number, because the mean of its divisors is an integer number (8888537993244).

Almost surely, 2^{105555520572261} is an apocalyptic number.

It is an amenable number.

105555520572261 is a deficient number, since it is larger than the sum of its proper divisors (36661087319643).

105555520572261 is an equidigital number, since it uses as much as digits as its factorization.

105555520572261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63721540.

The product of its (nonzero) digits is 5250000, while the sum is 51.

The spelling of 105555520572261 in words is "one hundred five trillion, five hundred fifty-five billion, five hundred twenty million, five hundred seventy-two thousand, two hundred sixty-one".