11042940591 has 24 divisors (see below), whose sum is σ = 16180849776. Its totient is φ = 7256252160.

The previous prime is 11042940551. The next prime is 11042940617. The reversal of 11042940591 is 19504924011.

It is a happy number.

11042940591 is a `hidden beast` number, since 1 + 1 + 0 + 4 + 29 + 40 + 591 = 666.

It is not a de Polignac number, because 11042940591 - 2¹³ = 11042932399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11042940551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 306381 + ... + 340521.

It is an arithmetic number, because the mean of its divisors is an integer number (674202074).

Almost surely, 2^11042940591 is an apocalyptic number.

11042940591 is a deficient number, since it is larger than the sum of its proper divisors (5137909185).

11042940591 is a wasteful number, since it uses less digits than its factorization.

11042940591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34663 (or 34660 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 11042940591 in words is "eleven billion, forty-two million, nine hundred forty thousand, five hundred ninety-one".