11423934561 has 16 divisors (see below), whose sum is σ = 17116799616. Its totient is φ = 6724455936.

The previous prime is 11423934541. The next prime is 11423934569. The reversal of 11423934561 is 16543932411.

It is not a de Polignac number, because 11423934561 - 2¹⁰ = 11423933537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11423934569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6366960 + ... + 6368753.

It is an arithmetic number, because the mean of its divisors is an integer number (1069799976).

Almost surely, 2^11423934561 is an apocalyptic number.

It is an amenable number.

11423934561 is a deficient number, since it is larger than the sum of its proper divisors (5692865055).

11423934561 is a wasteful number, since it uses less digits than its factorization.

11423934561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12735752.

The product of its digits is 77760, while the sum is 39.

The spelling of 11423934561 in words is "eleven billion, four hundred twenty-three million, nine hundred thirty-four thousand, five hundred sixty-one".