11430840961 has 4 divisors (see below), whose sum is σ = 11431084032. Its totient is φ = 11430597892.

The previous prime is 11430840947. The next prime is 11430840977. The reversal of 11430840961 is 16904803411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16904803411 = 105019 ⋅160969.

It is a cyclic number.

It is not a de Polignac number, because 11430840961 - 2¹³ = 11430832769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11430840961.

It is not an unprimeable number, because it can be changed into a prime (11430840461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25921 + ... + 153406.

It is an arithmetic number, because the mean of its divisors is an integer number (2857771008).

Almost surely, 2^11430840961 is an apocalyptic number.

It is an amenable number.

11430840961 is a deficient number, since it is larger than the sum of its proper divisors (243071).

11430840961 is an equidigital number, since it uses as much as digits as its factorization.

11430840961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243070.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 11430840961 in words is "eleven billion, four hundred thirty million, eight hundred forty thousand, nine hundred sixty-one".