1494742423681 has 4 divisors (see below), whose sum is σ = 1609722610132. Its totient is φ = 1379762237232.

The previous prime is 1494742423673. The next prime is 1494742423693. The reversal of 1494742423681 is 1863242474941.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 986031126081 + 508711297600 = 992991^2 + 713240^2 .

It is a cyclic number.

It is not a de Polignac number, because 1494742423681 - 2³ = 1494742423673 is a prime.

It is a super-2 number, since 2×1494742423681² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1494742423661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57490093206 + ... + 57490093231.

It is an arithmetic number, because the mean of its divisors is an integer number (402430652533).

Almost surely, 2^{1494742423681} is an apocalyptic number.

It is an amenable number.

1494742423681 is a deficient number, since it is larger than the sum of its proper divisors (114980186451).

1494742423681 is a wasteful number, since it uses less digits than its factorization.

1494742423681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114980186450.

The product of its digits is 9289728, while the sum is 55.

The spelling of 1494742423681 in words is "one trillion, four hundred ninety-four billion, seven hundred forty-two million, four hundred twenty-three thousand, six hundred eighty-one".