11523431647 has 8 divisors (see below), whose sum is σ = 14182685216. Its totient is φ = 9117440352.

The previous prime is 11523431611. The next prime is 11523431651. The reversal of 11523431647 is 74613432511.

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 11523431647 - 2¹⁵ = 11523398879 is a prime.

It is a super-2 number, since 2×11523431647² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11523431747) 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, 63315468 + ... + 63315649.

It is an arithmetic number, because the mean of its divisors is an integer number (1772835652).

Almost surely, 2^11523431647 is an apocalyptic number.

11523431647 is a deficient number, since it is larger than the sum of its proper divisors (2659253569).

11523431647 is a wasteful number, since it uses less digits than its factorization.

11523431647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126631137.

The product of its digits is 60480, while the sum is 37.

The spelling of 11523431647 in words is "eleven billion, five hundred twenty-three million, four hundred thirty-one thousand, six hundred forty-seven".