11931305647 has 8 divisors (see below), whose sum is σ = 12056488416. Its totient is φ = 11806167552.

The previous prime is 11931305641. The next prime is 11931305713. The reversal of 11931305647 is 74650313911.

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 11931305647 - 2¹⁵ = 11931272879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11931305641) 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, 994398 + ... + 1006324.

It is an arithmetic number, because the mean of its divisors is an integer number (1507061052).

Almost surely, 2^11931305647 is an apocalyptic number.

11931305647 is a deficient number, since it is larger than the sum of its proper divisors (125182769).

11931305647 is a wasteful number, since it uses less digits than its factorization.

11931305647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22337.

The product of its (nonzero) digits is 68040, while the sum is 40.

The spelling of 11931305647 in words is "eleven billion, nine hundred thirty-one million, three hundred five thousand, six hundred forty-seven".