105643135541655 has 20 divisors (see below), whose sum is σ = 189375102230952. Its totient is φ = 56343005622000.

The previous prime is 105643135541651. The next prime is 105643135541677. The reversal of 105643135541655 is 556145531346501.

105643135541655 is a `hidden beast` number, since 1 + 0 + 5 + 6 + 4 + 3 + 1 + 35 + 541 + 65 + 5 = 666.

It is not a de Polignac number, because 105643135541655 - 2² = 105643135541651 is a prime.

It is a super-2 number, since 2×105643135541655² (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 (105643135541651) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 130423623721 + ... + 130423624530.

Almost surely, 2^{105643135541655} is an apocalyptic number.

105643135541655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

105643135541655 is a deficient number, since it is larger than the sum of its proper divisors (83731966689297).

105643135541655 is an equidigital number, since it uses as much as digits as its factorization.

105643135541655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260847248268 (or 260847248259 counting only the distinct ones).

The product of its (nonzero) digits is 16200000, while the sum is 54.

The spelling of 105643135541655 in words is "one hundred five trillion, six hundred forty-three billion, one hundred thirty-five million, five hundred forty-one thousand, six hundred fifty-five".