1366541634461 has 4 divisors (see below), whose sum is σ = 1438464878400. Its totient is φ = 1294618390524.

The previous prime is 1366541634401. The next prime is 1366541634463. The reversal of 1366541634461 is 1644361456631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1366541634461 - 2¹⁰ = 1366541633437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366541634463) 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, 35961621941 + ... + 35961621978.

It is an arithmetic number, because the mean of its divisors is an integer number (359616219600).

Almost surely, 2^{1366541634461} is an apocalyptic number.

It is an amenable number.

1366541634461 is a deficient number, since it is larger than the sum of its proper divisors (71923243939).

1366541634461 is an equidigital number, since it uses as much as digits as its factorization.

1366541634461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71923243938.

The product of its digits is 3732480, while the sum is 50.

It can be divided in two parts, 1366541 and 634461, that added together give a palindrome (2001002).

The spelling of 1366541634461 in words is "one trillion, three hundred sixty-six billion, five hundred forty-one million, six hundred thirty-four thousand, four hundred sixty-one".