1361128120461 has 12 divisors (see below), whose sum is σ = 1983472837788. Its totient is φ = 899388491904.

The previous prime is 1361128120453. The next prime is 1361128120501. The reversal of 1361128120461 is 1640218211631.

1361128120461 is a `hidden beast` number, since 1 + 3 + 6 + 112 + 81 + 2 + 0 + 461 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 660066878025 + 701061242436 = 812445^2 + 837294^2 .

It is not a de Polignac number, because 1361128120461 - 2³ = 1361128120453 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361128120411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 669186850 + ... + 669188883.

It is an arithmetic number, because the mean of its divisors is an integer number (165289403149).

Almost surely, 2^{1361128120461} is an apocalyptic number.

It is an amenable number.

1361128120461 is a deficient number, since it is larger than the sum of its proper divisors (622344717327).

1361128120461 is a wasteful number, since it uses less digits than its factorization.

1361128120461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338375852 (or 1338375849 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 1361128120461 in words is "one trillion, three hundred sixty-one billion, one hundred twenty-eight million, one hundred twenty thousand, four hundred sixty-one".