1361316212761 has 4 divisors (see below), whose sum is σ = 1361909898532. Its totient is φ = 1360722526992.

The previous prime is 1361316212747. The next prime is 1361316212833. The reversal of 1361316212761 is 1672126131631.

It is a happy number.

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 389650608400 + 971665604361 = 624220^2 + 985731^2 .

It is a cyclic number.

It is not a de Polignac number, because 1361316212761 - 2¹¹ = 1361316210713 is a prime.

It is a super-2 number, since 2×1361316212761² (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 (1361316212461) 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, 296839446 + ... + 296844031.

It is an arithmetic number, because the mean of its divisors is an integer number (340477474633).

Almost surely, 2^{1361316212761} is an apocalyptic number.

It is an amenable number.

1361316212761 is a deficient number, since it is larger than the sum of its proper divisors (593685771).

1361316212761 is an equidigital number, since it uses as much as digits as its factorization.

1361316212761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593685770.

The product of its digits is 54432, while the sum is 40.

The spelling of 1361316212761 in words is "one trillion, three hundred sixty-one billion, three hundred sixteen million, two hundred twelve thousand, seven hundred sixty-one".