1098381553369 has 9 divisors (see below), whose sum is σ = 1103834057781. Its totient is φ = 1092955865820.

The previous prime is 1098381553349. The next prime is 1098381553397. The reversal of 1098381553369 is 9633551838901.

The square root of 1098381553369 is 1048037.

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

It is not a de Polignac number, because 1098381553369 - 2⁹ = 1098381552857 is a prime.

It is a super-2 number, since 2×1098381553369² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098381553349) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 221133324 + ... + 221138290.

Almost surely, 2^{1098381553369} is an apocalyptic number.

1098381553369 is the 1048037-th square number.

1098381553369 is the 524019-th centered octagonal number.

It is an amenable number.

1098381553369 is a deficient number, since it is larger than the sum of its proper divisors (5452504412).

1098381553369 is an frugal number, since it uses more digits than its factorization.

1098381553369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10356 (or 5178 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 61.

The spelling of 1098381553369 in words is "one trillion, ninety-eight billion, three hundred eighty-one million, five hundred fifty-three thousand, three hundred sixty-nine".