1084638258409 has 2 divisors, whose sum is σ = 1084638258410. Its totient is φ = 1084638258408.

The previous prime is 1084638258383. The next prime is 1084638258421. The reversal of 1084638258409 is 9048528364801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 586947515625 + 497690742784 = 766125^2 + 705472^2 .

It is a cyclic number.

It is not a de Polignac number, because 1084638258409 - 2⁵ = 1084638258377 is a prime.

It is a super-2 number, since 2×1084638258409² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1084638258439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542319129204 + 542319129205.

It is an arithmetic number, because the mean of its divisors is an integer number (542319129205).

Almost surely, 2^{1084638258409} is an apocalyptic number.

It is an amenable number.

1084638258409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1084638258409 is an equidigital number, since it uses as much as digits as its factorization.

1084638258409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13271040, while the sum is 58.

The spelling of 1084638258409 in words is "one trillion, eighty-four billion, six hundred thirty-eight million, two hundred fifty-eight thousand, four hundred nine".