1313606644421 has 2 divisors, whose sum is σ = 1313606644422. Its totient is φ = 1313606644420.

The previous prime is 1313606644351. The next prime is 1313606644439. The reversal of 1313606644421 is 1244466063131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1057115041921 + 256491602500 = 1028161^2 + 506450^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313606644421 - 2¹⁰ = 1313606643397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313606644321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656803322210 + 656803322211.

It is an arithmetic number, because the mean of its divisors is an integer number (656803322211).

Almost surely, 2^{1313606644421} is an apocalyptic number.

It is an amenable number.

1313606644421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313606644421 is an equidigital number, since it uses as much as digits as its factorization.

1313606644421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 1313606644421 in words is "one trillion, three hundred thirteen billion, six hundred six million, six hundred forty-four thousand, four hundred twenty-one".