1098905368909 has 4 divisors (see below), whose sum is σ = 1098973290016. Its totient is φ = 1098837447804.

The previous prime is 1098905368871. The next prime is 1098905368921. The reversal of 1098905368909 is 9098635098901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1098905368909 - 2³⁵ = 1064545630541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098905168909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33936279 + ... + 33968644.

It is an arithmetic number, because the mean of its divisors is an integer number (274743322504).

Almost surely, 2^{1098905368909} is an apocalyptic number.

It is an amenable number.

1098905368909 is a deficient number, since it is larger than the sum of its proper divisors (67921107).

1098905368909 is an equidigital number, since it uses as much as digits as its factorization.

1098905368909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67921106.

The product of its (nonzero) digits is 37791360, while the sum is 67.

The spelling of 1098905368909 in words is "one trillion, ninety-eight billion, nine hundred five million, three hundred sixty-eight thousand, nine hundred nine".