105556060605557 has 4 divisors (see below), whose sum is σ = 111765240641196. Its totient is φ = 99346880569920.

The previous prime is 105556060605469. The next prime is 105556060605559. The reversal of 105556060605557 is 755506060655501.

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 84732043410001 + 20824017195556 = 9205001^2 + 4563334^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105556060605557 is a prime.

It is a super-2 number, since 2×105556060605557² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105556060605559) 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, 3104590017794 + ... + 3104590017827.

It is an arithmetic number, because the mean of its divisors is an integer number (27941310160299).

Almost surely, 2^{105556060605557} is an apocalyptic number.

105556060605557 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

105556060605557 is a deficient number, since it is larger than the sum of its proper divisors (6209180035639).

105556060605557 is an equidigital number, since it uses as much as digits as its factorization.

105556060605557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6209180035638.

The product of its (nonzero) digits is 23625000, while the sum is 56.

The spelling of 105556060605557 in words is "one hundred five trillion, five hundred fifty-six billion, sixty million, six hundred five thousand, five hundred fifty-seven".