11109491831 has 8 divisors (see below), whose sum is σ = 11210568480. Its totient is φ = 11008463872.

The previous prime is 11109491821. The next prime is 11109491909. The reversal of 11109491831 is 13819490111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11109491831 - 2²² = 11105297527 is a prime.

It is a super-2 number, since 2×11109491831² (a number of 21 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 (11109491821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 572750 + ... + 591828.

It is an arithmetic number, because the mean of its divisors is an integer number (1401321060).

Almost surely, 2^11109491831 is an apocalyptic number.

11109491831 is a deficient number, since it is larger than the sum of its proper divisors (101076649).

11109491831 is a wasteful number, since it uses less digits than its factorization.

11109491831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24345.

The product of its (nonzero) digits is 7776, while the sum is 38.

The spelling of 11109491831 in words is "eleven billion, one hundred nine million, four hundred ninety-one thousand, eight hundred thirty-one".