11091898452 has 12 divisors (see below), whose sum is σ = 25881096416. Its totient is φ = 3697299480.

The previous prime is 11091898397. The next prime is 11091898471. The reversal of 11091898452 is 25489819011.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×11091898452² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462162424 + ... + 462162447.

Almost surely, 2^11091898452 is an apocalyptic number.

11091898452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11091898452 is an abundant number, since it is smaller than the sum of its proper divisors (14789197964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11091898452 is a wasteful number, since it uses less digits than its factorization.

11091898452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924324878 (or 924324876 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 48.

The spelling of 11091898452 in words is "eleven billion, ninety-one million, eight hundred ninety-eight thousand, four hundred fifty-two".