11440161640 has 32 divisors (see below), whose sum is σ = 25743410280. Its totient is φ = 4575523072.

The previous prime is 11440161587. The next prime is 11440161661. The reversal of 11440161640 is 4616104411.

It can be written as a sum of positive squares in 4 ways, for example, as 6938556804 + 4501604836 = 83298^2 + 67094^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11440161599 and 11440161608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 641322 + ... + 658918.

Almost surely, 2^11440161640 is an apocalyptic number.

11440161640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11440161640 is an abundant number, since it is smaller than the sum of its proper divisors (14303248640).

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

11440161640 is a wasteful number, since it uses less digits than its factorization.

11440161640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33861 (or 33857 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 11440161640 in words is "eleven billion, four hundred forty million, one hundred sixty-one thousand, six hundred forty".