4494991781213 has 2 divisors, whose sum is σ = 4494991781214. Its totient is φ = 4494991781212.

The previous prime is 4494991781207. The next prime is 4494991781341. The reversal of 4494991781213 is 3121871994944.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4494896093689 + 95687524 = 2120117^2 + 9782^2 .

It is a cyclic number.

It is not a de Polignac number, because 4494991781213 - 2⁶ = 4494991781149 is a prime.

It is a super-2 number, since 2×4494991781213² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4494991781113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2247495890606 + 2247495890607.

It is an arithmetic number, because the mean of its divisors is an integer number (2247495890607).

Almost surely, 2^{4494991781213} is an apocalyptic number.

It is an amenable number.

4494991781213 is a deficient number, since it is larger than the sum of its proper divisors (1).

4494991781213 is an equidigital number, since it uses as much as digits as its factorization.

4494991781213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15676416, while the sum is 62.

The spelling of 4494991781213 in words is "four trillion, four hundred ninety-four billion, nine hundred ninety-one million, seven hundred eighty-one thousand, two hundred thirteen".