1061205261673 has 4 divisors (see below), whose sum is σ = 1062994815828. Its totient is φ = 1059415707520.

The previous prime is 1061205261647. The next prime is 1061205261679. The reversal of 1061205261673 is 3761625021601.

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 864178470544 + 197026791129 = 929612^2 + 443877^2 .

It is a cyclic number.

It is not a de Polignac number, because 1061205261673 - 2²⁵ = 1061171707241 is a prime.

It is a super-2 number, since 2×1061205261673² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1061205261679) 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, 894776188 + ... + 894777373.

It is an arithmetic number, because the mean of its divisors is an integer number (265748703957).

Almost surely, 2^{1061205261673} is an apocalyptic number.

It is an amenable number.

1061205261673 is a deficient number, since it is larger than the sum of its proper divisors (1789554155).

1061205261673 is an equidigital number, since it uses as much as digits as its factorization.

1061205261673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789554154.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 1061205261673 in words is "one trillion, sixty-one billion, two hundred five million, two hundred sixty-one thousand, six hundred seventy-three".