1084638258389 has 12 divisors (see below), whose sum is σ = 1261782242604. Its totient is φ = 929645587584.

The previous prime is 1084638258383. The next prime is 1084638258409. The reversal of 1084638258389 is 9838528364801.

It can be written as a sum of positive squares in 2 ways, for example, as 550252404100 + 534385854289 = 741790^2 + 731017^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1084638258389 is a prime.

It is a super-2 number, since 2×1084638258389² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1084638258383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 531197 + ... + 1565709.

It is an arithmetic number, because the mean of its divisors is an integer number (105148520217).

Almost surely, 2^{1084638258389} is an apocalyptic number.

It is an amenable number.

1084638258389 is a deficient number, since it is larger than the sum of its proper divisors (177143984215).

1084638258389 is a wasteful number, since it uses less digits than its factorization.

1084638258389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055924 (or 1055917 counting only the distinct ones).

The product of its (nonzero) digits is 79626240, while the sum is 65.

The spelling of 1084638258389 in words is "one trillion, eighty-four billion, six hundred thirty-eight million, two hundred fifty-eight thousand, three hundred eighty-nine".