1061565650105 has 4 divisors (see below), whose sum is σ = 1273878780132. Its totient is φ = 849252520080.

The previous prime is 1061565650039. The next prime is 1061565650179. The reversal of 1061565650105 is 5010565651601.

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 507928461481 + 553637188624 = 712691^2 + 744068^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1061565650105 is a prime.

It is a super-2 number, since 2×1061565650105² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

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, 106156565006 + ... + 106156565015.

It is an arithmetic number, because the mean of its divisors is an integer number (318469695033).

Almost surely, 2^{1061565650105} is an apocalyptic number.

It is an amenable number.

1061565650105 is a deficient number, since it is larger than the sum of its proper divisors (212313130027).

1061565650105 is an equidigital number, since it uses as much as digits as its factorization.

1061565650105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212313130026.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 1061565650105 in words is "one trillion, sixty-one billion, five hundred sixty-five million, six hundred fifty thousand, one hundred five".