1478912557889 has 6 divisors (see below), whose sum is σ = 1601426024406. Its totient is φ = 1365150053280.

The previous prime is 1478912557849. The next prime is 1478912557951. The reversal of 1478912557889 is 9887552198741.

It can be written as a sum of positive squares in 3 ways, for example, as 22292878864 + 1456619679025 = 149308^2 + 1206905^2 .

It is not a de Polignac number, because 1478912557889 - 2⁴⁰ = 379400930113 is a prime.

It is a super-2 number, since 2×1478912557889² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1478912557849) 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 5 ways as a sum of consecutive naturals, for example, 4375480772 + ... + 4375481109.

It is an arithmetic number, because the mean of its divisors is an integer number (266904337401).

Almost surely, 2^{1478912557889} is an apocalyptic number.

It is an amenable number.

1478912557889 is a deficient number, since it is larger than the sum of its proper divisors (122513466517).

1478912557889 is an equidigital number, since it uses as much as digits as its factorization.

1478912557889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8750961907 (or 8750961894 counting only the distinct ones).

The product of its digits is 406425600, while the sum is 74.

The spelling of 1478912557889 in words is "one trillion, four hundred seventy-eight billion, nine hundred twelve million, five hundred fifty-seven thousand, eight hundred eighty-nine".