11140802561 has 8 divisors (see below), whose sum is σ = 12742142784. Its totient is φ = 9541911600.

The previous prime is 11140802557. The next prime is 11140802609. The reversal of 11140802561 is 16520804111.

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 11140802561 - 2² = 11140802557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11140802501) 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, 602555 + ... + 620768.

It is an arithmetic number, because the mean of its divisors is an integer number (1592767848).

Almost surely, 2^11140802561 is an apocalyptic number.

It is an amenable number.

11140802561 is a deficient number, since it is larger than the sum of its proper divisors (1601340223).

11140802561 is a wasteful number, since it uses less digits than its factorization.

11140802561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224631.

The product of its (nonzero) digits is 1920, while the sum is 29.

The spelling of 11140802561 in words is "eleven billion, one hundred forty million, eight hundred two thousand, five hundred sixty-one".