11731423649 has 8 divisors (see below), whose sum is σ = 12978169920. Its totient is φ = 10514719600.

The previous prime is 11731423637. The next prime is 11731423687. The reversal of 11731423649 is 94632413711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11731423649 - 2²⁰ = 11730375073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11731425649) 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 7 ways as a sum of consecutive naturals, for example, 7509734 + ... + 7511295.

It is an arithmetic number, because the mean of its divisors is an integer number (1622271240).

Almost surely, 2^11731423649 is an apocalyptic number.

It is an amenable number.

11731423649 is a deficient number, since it is larger than the sum of its proper divisors (1246746271).

11731423649 is a wasteful number, since it uses less digits than its factorization.

11731423649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15021111.

The product of its digits is 108864, while the sum is 41.

The spelling of 11731423649 in words is "eleven billion, seven hundred thirty-one million, four hundred twenty-three thousand, six hundred forty-nine".