5491354985361 has 18 divisors (see below), whose sum is σ = 9226970622402. Its totient is φ = 3137917134240.

The previous prime is 5491354985353. The next prime is 5491354985383. The reversal of 5491354985361 is 1635894531945.

5491354985361 is a `hidden beast` number, since 5 + 4 + 9 + 1 + 3 + 5 + 4 + 98 + 536 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5174351078400 + 317003906961 = 2274720^2 + 563031^2 .

It is not a de Polignac number, because 5491354985361 - 2³ = 5491354985353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (5491354985161) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6226025620 + ... + 6226026501.

Almost surely, 2^{5491354985361} is an apocalyptic number.

It is an amenable number.

5491354985361 is a deficient number, since it is larger than the sum of its proper divisors (3735615637041).

5491354985361 is a wasteful number, since it uses less digits than its factorization.

5491354985361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12452052141 (or 12452052131 counting only the distinct ones).

The product of its digits is 69984000, while the sum is 63.

The spelling of 5491354985361 in words is "five trillion, four hundred ninety-one billion, three hundred fifty-four million, nine hundred eighty-five thousand, three hundred sixty-one".