105407255421857 has 4 divisors (see below), whose sum is σ = 111607682211396. Its totient is φ = 99206828632320.

The previous prime is 105407255421841. The next prime is 105407255421887. The reversal of 105407255421857 is 758124552704501.

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 32986746941281 + 72420508480576 = 5743409^2 + 8510024^2 .

It is a cyclic number.

It is not a de Polignac number, because 105407255421857 - 2⁴ = 105407255421841 is a prime.

It is a super-2 number, since 2×105407255421857² (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 (105407255421887) 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, 3100213394744 + ... + 3100213394777.

It is an arithmetic number, because the mean of its divisors is an integer number (27901920552849).

Almost surely, 2^{105407255421857} is an apocalyptic number.

105407255421857 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

105407255421857 is a deficient number, since it is larger than the sum of its proper divisors (6200426789539).

105407255421857 is an equidigital number, since it uses as much as digits as its factorization.

105407255421857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6200426789538.

The product of its (nonzero) digits is 15680000, while the sum is 56.

The spelling of 105407255421857 in words is "one hundred five trillion, four hundred seven billion, two hundred fifty-five million, four hundred twenty-one thousand, eight hundred fifty-seven".