2105461643240 has 16 divisors (see below), whose sum is σ = 4737288697380. Its totient is φ = 842184657280.

The previous prime is 2105461643239. The next prime is 2105461643251. The reversal of 2105461643240 is 423461645012.

It can be written as a sum of positive squares in 2 ways, for example, as 2062653205636 + 42808437604 = 1436194^2 + 206902^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2105461643194 and 2105461643203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26318270501 + ... + 26318270580.

Almost surely, 2^{2105461643240} is an apocalyptic number.

2105461643240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105461643240 is an abundant number, since it is smaller than the sum of its proper divisors (2631827054140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2105461643240 is a wasteful number, since it uses less digits than its factorization.

2105461643240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52636541092 (or 52636541088 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 2105461643240 in words is "two trillion, one hundred five billion, four hundred sixty-one million, six hundred forty-three thousand, two hundred forty".