1313454553981 has 2 divisors, whose sum is σ = 1313454553982. Its totient is φ = 1313454553980.

The previous prime is 1313454553967. The next prime is 1313454554141. The reversal of 1313454553981 is 1893554543131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1232619534756 + 80835019225 = 1110234^2 + 284315^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313454553981 - 2²⁷ = 1313320336253 is a prime.

It is a super-3 number, since 3×1313454553981³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313454559981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656727276990 + 656727276991.

It is an arithmetic number, because the mean of its divisors is an integer number (656727276991).

Almost surely, 2^{1313454553981} is an apocalyptic number.

It is an amenable number.

1313454553981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313454553981 is an equidigital number, since it uses as much as digits as its factorization.

1313454553981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888000, while the sum is 52.

The spelling of 1313454553981 in words is "one trillion, three hundred thirteen billion, four hundred fifty-four million, five hundred fifty-three thousand, nine hundred eighty-one".