11523431656 has 32 divisors (see below), whose sum is σ = 23647488480. Its totient is φ = 5220849600.

The previous prime is 11523431653. The next prime is 11523431671. The reversal of 11523431656 is 65613432511.

It is not an unprimeable number, because it can be changed into a prime (11523431651) 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, 186255 + ... + 240286.

It is an arithmetic number, because the mean of its divisors is an integer number (738984015).

Almost surely, 2^11523431656 is an apocalyptic number.

It is an amenable number.

11523431656 is an abundant number, since it is smaller than the sum of its proper divisors (12124056824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11523431656 is a wasteful number, since it uses less digits than its factorization.

11523431656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426865 (or 426861 counting only the distinct ones).

The product of its digits is 64800, while the sum is 37.

The spelling of 11523431656 in words is "eleven billion, five hundred twenty-three million, four hundred thirty-one thousand, six hundred fifty-six".