1300844387681 has 4 divisors (see below), whose sum is σ = 1300848974532. Its totient is φ = 1300839800832.

The previous prime is 1300844387641. The next prime is 1300844387737. The reversal of 1300844387681 is 1867834480031.

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 162816285025 + 1138028102656 = 403505^2 + 1066784^2 .

It is a cyclic number.

It is not a de Polignac number, because 1300844387681 - 2¹⁰ = 1300844386657 is a prime.

It is a super-2 number, since 2×1300844387681² (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 (1300844387621) 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, 1837856 + ... + 2445281.

It is an arithmetic number, because the mean of its divisors is an integer number (325212243633).

Almost surely, 2^{1300844387681} is an apocalyptic number.

It is an amenable number.

1300844387681 is a deficient number, since it is larger than the sum of its proper divisors (4586851).

1300844387681 is an equidigital number, since it uses as much as digits as its factorization.

1300844387681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4586850.

The product of its (nonzero) digits is 3096576, while the sum is 53.

The spelling of 1300844387681 in words is "one trillion, three hundred billion, eight hundred forty-four million, three hundred eighty-seven thousand, six hundred eighty-one".