2105660361554 has 16 divisors (see below), whose sum is σ = 3271881143160. Its totient is φ = 1015610365440.

The previous prime is 2105660361529. The next prime is 2105660361559. The reversal of 2105660361554 is 4551630665012.

It can be written as a sum of positive squares in 4 ways, for example, as 484100067529 + 1621560294025 = 695773^2 + 1273405^2 .

It is not an unprimeable number, because it can be changed into a prime (2105660361559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144255539 + ... + 144270134.

Almost surely, 2^{2105660361554} is an apocalyptic number.

2105660361554 is a deficient number, since it is larger than the sum of its proper divisors (1166220781606).

2105660361554 is a wasteful number, since it uses less digits than its factorization.

2105660361554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288525805.

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 2105660361554 in words is "two trillion, one hundred five billion, six hundred sixty million, three hundred sixty-one thousand, five hundred fifty-four".