1494191758889 has 2 divisors, whose sum is σ = 1494191758890. Its totient is φ = 1494191758888.

The previous prime is 1494191758853. The next prime is 1494191758933. The reversal of 1494191758889 is 9888571914941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1202367075625 + 291824683264 = 1096525^2 + 540208^2 .

It is an emirp because it is prime and its reverse (9888571914941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1494191758889 - 2¹² = 1494191754793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1494191758849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 747095879444 + 747095879445.

It is an arithmetic number, because the mean of its divisors is an integer number (747095879445).

Almost surely, 2^{1494191758889} is an apocalyptic number.

It is an amenable number.

1494191758889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1494191758889 is an equidigital number, since it uses as much as digits as its factorization.

1494191758889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209018880, while the sum is 74.

The spelling of 1494191758889 in words is "one trillion, four hundred ninety-four billion, one hundred ninety-one million, seven hundred fifty-eight thousand, eight hundred eighty-nine".