1494884159981 has 2 divisors, whose sum is σ = 1494884159982. Its totient is φ = 1494884159980.

The previous prime is 1494884159929. The next prime is 1494884160013. The reversal of 1494884159981 is 1899514884941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 880283038756 + 614601121225 = 938234^2 + 783965^2 .

It is a cyclic number.

It is not a de Polignac number, because 1494884159981 - 2⁶ = 1494884159917 is a prime.

It is a super-2 number, since 2×1494884159981² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1494884159911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 747442079990 + 747442079991.

It is an arithmetic number, because the mean of its divisors is an integer number (747442079991).

Almost surely, 2^{1494884159981} is an apocalyptic number.

It is an amenable number.

1494884159981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1494884159981 is an equidigital number, since it uses as much as digits as its factorization.

1494884159981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 119439360, while the sum is 71.

The spelling of 1494884159981 in words is "one trillion, four hundred ninety-four billion, eight hundred eighty-four million, one hundred fifty-nine thousand, nine hundred eighty-one".