1489781755540 has 36 divisors (see below), whose sum is σ = 3387710828124. Its totient is φ = 550073262336.

The previous prime is 1489781755537. The next prime is 1489781755543. The reversal of 1489781755540 is 455571879841.

It is an interprime number because it is at equal distance from previous prime (1489781755537) and next prime (1489781755543).

It can be written as a sum of positive squares in 6 ways, for example, as 667992366864 + 821789388676 = 817308^2 + 906526^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1489781755543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 220378537 + ... + 220385296.

It is an arithmetic number, because the mean of its divisors is an integer number (94103078559).

Almost surely, 2^{1489781755540} is an apocalyptic number.

1489781755540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1489781755540 is an abundant number, since it is smaller than the sum of its proper divisors (1897929072584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1489781755540 is a wasteful number, since it uses less digits than its factorization.

1489781755540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440763868 (or 440763853 counting only the distinct ones).

The product of its (nonzero) digits is 56448000, while the sum is 64.

The spelling of 1489781755540 in words is "one trillion, four hundred eighty-nine billion, seven hundred eighty-one million, seven hundred fifty-five thousand, five hundred forty".