2105656345426 has 8 divisors (see below), whose sum is σ = 3176741654604. Its totient is φ = 1046742460560.

The previous prime is 2105656345411. The next prime is 2105656345427. The reversal of 2105656345426 is 6245436565012.

It can be written as a sum of positive squares in 2 ways, for example, as 1662900516225 + 442755829201 = 1289535^2 + 665399^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2105656345426² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2105656345426.

It is not an unprimeable number, because it can be changed into a prime (2105656345427) 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, 3042855645 + ... + 3042856336.

Almost surely, 2^{2105656345426} is an apocalyptic number.

2105656345426 is a deficient number, since it is larger than the sum of its proper divisors (1071085309178).

2105656345426 is a wasteful number, since it uses less digits than its factorization.

2105656345426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6085712156.

The product of its (nonzero) digits is 5184000, while the sum is 49.

The spelling of 2105656345426 in words is "two trillion, one hundred five billion, six hundred fifty-six million, three hundred forty-five thousand, four hundred twenty-six".