1478253887842 has 4 divisors (see below), whose sum is σ = 2217380831766. Its totient is φ = 739126943920.

The previous prime is 1478253887837. The next prime is 1478253887893. The reversal of 1478253887842 is 2487883528741.

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

It can be written as a sum of positive squares in only one way, i.e., 1253842302001 + 224411585841 = 1119751^2 + 473721^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 369563471959 + ... + 369563471962.

Almost surely, 2^{1478253887842} is an apocalyptic number.

1478253887842 is a deficient number, since it is larger than the sum of its proper divisors (739126943924).

1478253887842 is an equidigital number, since it uses as much as digits as its factorization.

1478253887842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739126943923.

The product of its digits is 192675840, while the sum is 67.

The spelling of 1478253887842 in words is "one trillion, four hundred seventy-eight billion, two hundred fifty-three million, eight hundred eighty-seven thousand, eight hundred forty-two".