11431267761 has 8 divisors (see below), whose sum is σ = 15565981824. Its totient is φ = 7458699440.

The previous prime is 11431267733. The next prime is 11431267777. The reversal of 11431267761 is 16776213411.

It is a happy number.

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 11431267761 - 2⁹ = 11431267249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11431267061) 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, 40536270 + ... + 40536551.

It is an arithmetic number, because the mean of its divisors is an integer number (1945747728).

Almost surely, 2^11431267761 is an apocalyptic number.

It is an amenable number.

11431267761 is a deficient number, since it is larger than the sum of its proper divisors (4134714063).

11431267761 is an equidigital number, since it uses as much as digits as its factorization.

11431267761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81072871.

The product of its digits is 42336, while the sum is 39.

The spelling of 11431267761 in words is "eleven billion, four hundred thirty-one million, two hundred sixty-seven thousand, seven hundred sixty-one".