1313556440629 has 2 divisors, whose sum is σ = 1313556440630. Its totient is φ = 1313556440628.

The previous prime is 1313556440621. The next prime is 1313556440641. The reversal of 1313556440629 is 9260446553131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1177229340004 + 136327100625 = 1085002^2 + 369225^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313556440629 - 2³ = 1313556440621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313556440621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656778220314 + 656778220315.

It is an arithmetic number, because the mean of its divisors is an integer number (656778220315).

Almost surely, 2^{1313556440629} is an apocalyptic number.

It is an amenable number.

1313556440629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313556440629 is an equidigital number, since it uses as much as digits as its factorization.

1313556440629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 1313556440629 in words is "one trillion, three hundred thirteen billion, five hundred fifty-six million, four hundred forty thousand, six hundred twenty-nine".