1361253667605 has 64 divisors (see below), whose sum is σ = 2433773545728. Its totient is φ = 645320908800.

The previous prime is 1361253667597. The next prime is 1361253667607. The reversal of 1361253667605 is 5067663521631.

It is not a de Polignac number, because 1361253667605 - 2³ = 1361253667597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361253667607) 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 63 ways as a sum of consecutive naturals, for example, 272671 + ... + 1672380.

It is an arithmetic number, because the mean of its divisors is an integer number (38027711652).

Almost surely, 2^{1361253667605} is an apocalyptic number.

1361253667605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1361253667605 is a deficient number, since it is larger than the sum of its proper divisors (1072519878123).

1361253667605 is a wasteful number, since it uses less digits than its factorization.

1361253667605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945206.

The product of its (nonzero) digits is 4082400, while the sum is 51.

The spelling of 1361253667605 in words is "one trillion, three hundred sixty-one billion, two hundred fifty-three million, six hundred sixty-seven thousand, six hundred five".