1489749625809 has 15 divisors (see below), whose sum is σ = 2225444863147. Its totient is φ = 993159093888.

The previous prime is 1489749625801. The next prime is 1489749625811. The reversal of 1489749625809 is 9085269479841.

The square root of 1489749625809 is 1220553.

It is a perfect power (a square), and thus also a powerful number.

1489749625809 is a `hidden beast` number, since 1 + 4 + 89 + 7 + 496 + 2 + 58 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 373498211025 + 1116251414784 = 611145^2 + 1056528^2 .

It is not a de Polignac number, because 1489749625809 - 2³ = 1489749625801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1489749625801) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 10917169 + ... + 11052785.

Almost surely, 2^{1489749625809} is an apocalyptic number.

1489749625809 is the 1220553-rd square number.

1489749625809 is the 610277-th centered octagonal number.

It is an amenable number.

1489749625809 is a deficient number, since it is larger than the sum of its proper divisors (735695237338).

1489749625809 is an frugal number, since it uses more digits than its factorization.

1489749625809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271246 (or 135620 counting only the distinct ones).

The product of its (nonzero) digits is 313528320, while the sum is 72.

The spelling of 1489749625809 in words is "one trillion, four hundred eighty-nine billion, seven hundred forty-nine million, six hundred twenty-five thousand, eight hundred nine".